// Snap.svg 0.5.1
//
// Copyright (c) 2013 – 2017 Adobe Systems Incorporated. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// build: 2017-02-07

// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
// http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ┌────────────────────────────────────────────────────────────┐ \\
// │ Eve 0.5.0 - JavaScript Events Library                      │ \\
// ├────────────────────────────────────────────────────────────┤ \\
// │ Author Dmitry Baranovskiy (http://dmitry.baranovskiy.com/) │ \\
// └────────────────────────────────────────────────────────────┘ \\

(function (glob) {
    var version = "0.5.0",
        has = "hasOwnProperty",
        separator = /[\.\/]/,
        comaseparator = /\s*,\s*/,
        wildcard = "*",
        fun = function () { },
        numsort = function (a, b) {
            return a - b;
        },
        current_event,
        stop,
        events = { n: {} },
        firstDefined = function () {
            for (var i = 0, ii = this.length; i < ii; i++) {
                if (typeof this[i] != "undefined") {
                    return this[i];
                }
            }
        },
        lastDefined = function () {
            var i = this.length;
            while (--i) {
                if (typeof this[i] != "undefined") {
                    return this[i];
                }
            }
        },
        objtos = Object.prototype.toString,
        Str = String,
        isArray = Array.isArray || function (ar) {
            return ar instanceof Array || objtos.call(ar) == "[object Array]";
        };
    /*\
     * eve
     [ method ]

     * Fires event with given `name`, given scope and other parameters.

     > Arguments

     - name (string) name of the *event*, dot (`.`) or slash (`/`) separated
     - scope (object) context for the event handlers
     - varargs (...) the rest of arguments will be sent to event handlers

     = (object) array of returned values from the listeners. Array has two methods `.firstDefined()` and `.lastDefined()` to get first or last not `undefined` value.
    \*/
    eve = function (name, scope) {
        var e = events,
            oldstop = stop,
            args = Array.prototype.slice.call(arguments, 2),
            listeners = eve.listeners(name),
            z = 0,
            f = false,
            l,
            indexed = [],
            queue = {},
            out = [],
            ce = current_event,
            errors = [];
        out.firstDefined = firstDefined;
        out.lastDefined = lastDefined;
        current_event = name;
        stop = 0;
        for (var i = 0, ii = listeners.length; i < ii; i++) if ("zIndex" in listeners[i]) {
            indexed.push(listeners[i].zIndex);
            if (listeners[i].zIndex < 0) {
                queue[listeners[i].zIndex] = listeners[i];
            }
        }
        indexed.sort(numsort);
        while (indexed[z] < 0) {
            l = queue[indexed[z++]];
            out.push(l.apply(scope, args));
            if (stop) {
                stop = oldstop;
                return out;
            }
        }
        for (i = 0; i < ii; i++) {
            l = listeners[i];
            if ("zIndex" in l) {
                if (l.zIndex == indexed[z]) {
                    out.push(l.apply(scope, args));
                    if (stop) {
                        break;
                    }
                    do {
                        z++;
                        l = queue[indexed[z]];
                        l && out.push(l.apply(scope, args));
                        if (stop) {
                            break;
                        }
                    } while (l)
                } else {
                    queue[l.zIndex] = l;
                }
            } else {
                out.push(l.apply(scope, args));
                if (stop) {
                    break;
                }
            }
        }
        stop = oldstop;
        current_event = ce;
        return out;
    };
    // Undocumented. Debug only.
    eve._events = events;
    /*\
     * eve.listeners
     [ method ]

     * Internal method which gives you array of all event handlers that will be triggered by the given `name`.

     > Arguments

     - name (string) name of the event, dot (`.`) or slash (`/`) separated

     = (array) array of event handlers
    \*/
    eve.listeners = function (name) {
        var names = isArray(name) ? name : name.split(separator),
            e = events,
            item,
            items,
            k,
            i,
            ii,
            j,
            jj,
            nes,
            es = [e],
            out = [];
        for (i = 0, ii = names.length; i < ii; i++) {
            nes = [];
            for (j = 0, jj = es.length; j < jj; j++) {
                e = es[j].n;
                items = [e[names[i]], e[wildcard]];
                k = 2;
                while (k--) {
                    item = items[k];
                    if (item) {
                        nes.push(item);
                        out = out.concat(item.f || []);
                    }
                }
            }
            es = nes;
        }
        return out;
    };
    /*\
     * eve.separator
     [ method ]

     * If for some reasons you don’t like default separators (`.` or `/`) you can specify yours
     * here. Be aware that if you pass a string longer than one character it will be treated as
     * a list of characters.

     - separator (string) new separator. Empty string resets to default: `.` or `/`.
    \*/
    eve.separator = function (sep) {
        if (sep) {
            sep = Str(sep).replace(/(?=[\.\^\]\[\-])/g, "\\");
            sep = "[" + sep + "]";
            separator = new RegExp(sep);
        } else {
            separator = /[\.\/]/;
        }
    };
    /*\
     * eve.on
     [ method ]
     **
     * Binds given event handler with a given name. You can use wildcards “`*`” for the names:
     | eve.on("*.under.*", f);
     | eve("mouse.under.floor"); // triggers f
     * Use @eve to trigger the listener.
     **
     - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
     - f (function) event handler function
     **
     - name (array) if you don’t want to use separators, you can use array of strings
     - f (function) event handler function
     **
     = (function) returned function accepts a single numeric parameter that represents z-index of the handler. It is an optional feature and only used when you need to ensure that some subset of handlers will be invoked in a given order, despite of the order of assignment. 
     > Example:
     | eve.on("mouse", eatIt)(2);
     | eve.on("mouse", scream);
     | eve.on("mouse", catchIt)(1);
     * This will ensure that `catchIt` function will be called before `eatIt`.
     *
     * If you want to put your handler before non-indexed handlers, specify a negative value.
     * Note: I assume most of the time you don’t need to worry about z-index, but it’s nice to have this feature “just in case”.
    \*/
    eve.on = function (name, f) {
        if (typeof f != "function") {
            return function () { };
        }
        var names = isArray(name) ? (isArray(name[0]) ? name : [name]) : Str(name).split(comaseparator);
        for (var i = 0, ii = names.length; i < ii; i++) {
            (function (name) {
                var names = isArray(name) ? name : Str(name).split(separator),
                    e = events,
                    exist;
                for (var i = 0, ii = names.length; i < ii; i++) {
                    e = e.n;
                    e = e.hasOwnProperty(names[i]) && e[names[i]] || (e[names[i]] = { n: {} });
                }
                e.f = e.f || [];
                for (i = 0, ii = e.f.length; i < ii; i++) if (e.f[i] == f) {
                    exist = true;
                    break;
                }
                !exist && e.f.push(f);
            }(names[i]));
        }
        return function (zIndex) {
            if (+zIndex == +zIndex) {
                f.zIndex = +zIndex;
            }
        };
    };
    /*\
     * eve.f
     [ method ]
     **
     * Returns function that will fire given event with optional arguments.
     * Arguments that will be passed to the result function will be also
     * concated to the list of final arguments.
     | el.onclick = eve.f("click", 1, 2);
     | eve.on("click", function (a, b, c) {
     |     console.log(a, b, c); // 1, 2, [event object]
     | });
     > Arguments
     - event (string) event name
     - varargs (…) and any other arguments
     = (function) possible event handler function
    \*/
    eve.f = function (event) {
        var attrs = [].slice.call(arguments, 1);
        return function () {
            eve.apply(null, [event, null].concat(attrs).concat([].slice.call(arguments, 0)));
        };
    };
    /*\
     * eve.stop
     [ method ]
     **
     * Is used inside an event handler to stop the event, preventing any subsequent listeners from firing.
    \*/
    eve.stop = function () {
        stop = 1;
    };
    /*\
     * eve.nt
     [ method ]
     **
     * Could be used inside event handler to figure out actual name of the event.
     **
     > Arguments
     **
     - subname (string) #optional subname of the event
     **
     = (string) name of the event, if `subname` is not specified
     * or
     = (boolean) `true`, if current event’s name contains `subname`
    \*/
    eve.nt = function (subname) {
        var cur = isArray(current_event) ? current_event.join(".") : current_event;
        if (subname) {
            return new RegExp("(?:\\.|\\/|^)" + subname + "(?:\\.|\\/|$)").test(cur);
        }
        return cur;
    };
    /*\
     * eve.nts
     [ method ]
     **
     * Could be used inside event handler to figure out actual name of the event.
     **
     **
     = (array) names of the event
    \*/
    eve.nts = function () {
        return isArray(current_event) ? current_event : current_event.split(separator);
    };
    /*\
     * eve.off
     [ method ]
     **
     * Removes given function from the list of event listeners assigned to given name.
     * If no arguments specified all the events will be cleared.
     **
     > Arguments
     **
     - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
     - f (function) event handler function
    \*/
    /*\
     * eve.unbind
     [ method ]
     **
     * See @eve.off
    \*/
    eve.off = eve.unbind = function (name, f) {
        if (!name) {
            eve._events = events = { n: {} };
            return;
        }
        var names = isArray(name) ? (isArray(name[0]) ? name : [name]) : Str(name).split(comaseparator);
        if (names.length > 1) {
            for (var i = 0, ii = names.length; i < ii; i++) {
                eve.off(names[i], f);
            }
            return;
        }
        names = isArray(name) ? name : Str(name).split(separator);
        var e,
            key,
            splice,
            i, ii, j, jj,
            cur = [events],
            inodes = [];
        for (i = 0, ii = names.length; i < ii; i++) {
            for (j = 0; j < cur.length; j += splice.length - 2) {
                splice = [j, 1];
                e = cur[j].n;
                if (names[i] != wildcard) {
                    if (e[names[i]]) {
                        splice.push(e[names[i]]);
                        inodes.unshift({
                            n: e,
                            name: names[i]
                        });
                    }
                } else {
                    for (key in e) if (e[has](key)) {
                        splice.push(e[key]);
                        inodes.unshift({
                            n: e,
                            name: key
                        });
                    }
                }
                cur.splice.apply(cur, splice);
            }
        }
        for (i = 0, ii = cur.length; i < ii; i++) {
            e = cur[i];
            while (e.n) {
                if (f) {
                    if (e.f) {
                        for (j = 0, jj = e.f.length; j < jj; j++) if (e.f[j] == f) {
                            e.f.splice(j, 1);
                            break;
                        }
                        !e.f.length && delete e.f;
                    }
                    for (key in e.n) if (e.n[has](key) && e.n[key].f) {
                        var funcs = e.n[key].f;
                        for (j = 0, jj = funcs.length; j < jj; j++) if (funcs[j] == f) {
                            funcs.splice(j, 1);
                            break;
                        }
                        !funcs.length && delete e.n[key].f;
                    }
                } else {
                    delete e.f;
                    for (key in e.n) if (e.n[has](key) && e.n[key].f) {
                        delete e.n[key].f;
                    }
                }
                e = e.n;
            }
        }
        // prune inner nodes in path
        prune: for (i = 0, ii = inodes.length; i < ii; i++) {
            e = inodes[i];
            for (key in e.n[e.name].f) {
                // not empty (has listeners)
                continue prune;
            }
            for (key in e.n[e.name].n) {
                // not empty (has children)
                continue prune;
            }
            // is empty
            delete e.n[e.name];
        }
    };
    /*\
     * eve.once
     [ method ]
     **
     * Binds given event handler with a given name to only run once then unbind itself.
     | eve.once("login", f);
     | eve("login"); // triggers f
     | eve("login"); // no listeners
     * Use @eve to trigger the listener.
     **
     > Arguments
     **
     - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
     - f (function) event handler function
     **
     = (function) same return function as @eve.on
    \*/
    eve.once = function (name, f) {
        var f2 = function () {
            eve.off(name, f2);
            return f.apply(this, arguments);
        };
        return eve.on(name, f2);
    };
    /*\
     * eve.version
     [ property (string) ]
     **
     * Current version of the library.
    \*/
    eve.version = version;
    eve.toString = function () {
        return "You are running Eve " + version;
    };
    (typeof module != "undefined" && module.exports) ? (module.exports = eve) : (typeof define === "function" && define.amd ? (define("eve", [], function () { return eve; })) : (glob.eve = eve));
})(this);

(function (glob, factory) {
    // AMD support
    if (typeof define == "function" && define.amd) {
        // Define as an anonymous module
        define(["eve"], function (eve) {
            return factory(glob, eve);
        });
    } else if (typeof exports != "undefined") {
        // Next for Node.js or CommonJS
        var eve = require("eve");
        module.exports = factory(glob, eve);
    } else {
        // Browser globals (glob is window)
        // Snap adds itself to window
        factory(glob, glob.eve);
    }
}(window || this, function (window, eve) {

    // Copyright (c) 2017 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    var mina = (function (eve) {
        var animations = {},
            requestAnimFrame = window.requestAnimationFrame ||
                window.webkitRequestAnimationFrame ||
                window.mozRequestAnimationFrame ||
                window.oRequestAnimationFrame ||
                window.msRequestAnimationFrame ||
                function (callback) {
                    setTimeout(callback, 16, new Date().getTime());
                    return true;
                },
            requestID,
            isArray = Array.isArray || function (a) {
                return a instanceof Array ||
                    Object.prototype.toString.call(a) == "[object Array]";
            },
            idgen = 0,
            idprefix = "M" + (+new Date).toString(36),
            ID = function () {
                return idprefix + (idgen++).toString(36);
            },
            diff = function (a, b, A, B) {
                if (isArray(a)) {
                    res = [];
                    for (var i = 0, ii = a.length; i < ii; i++) {
                        res[i] = diff(a[i], b, A[i], B);
                    }
                    return res;
                }
                var dif = (A - a) / (B - b);
                return function (bb) {
                    return a + dif * (bb - b);
                };
            },
            timer = Date.now || function () {
                return +new Date;
            },
            sta = function (val) {
                var a = this;
                if (val == null) {
                    return a.s;
                }
                var ds = a.s - val;
                a.b += a.dur * ds;
                a.B += a.dur * ds;
                a.s = val;
            },
            speed = function (val) {
                var a = this;
                if (val == null) {
                    return a.spd;
                }
                a.spd = val;
            },
            duration = function (val) {
                var a = this;
                if (val == null) {
                    return a.dur;
                }
                a.s = a.s * val / a.dur;
                a.dur = val;
            },
            stopit = function () {
                var a = this;
                delete animations[a.id];
                a.update();
                eve("mina.stop." + a.id, a);
            },
            pause = function () {
                var a = this;
                if (a.pdif) {
                    return;
                }
                delete animations[a.id];
                a.update();
                a.pdif = a.get() - a.b;
            },
            resume = function () {
                var a = this;
                if (!a.pdif) {
                    return;
                }
                a.b = a.get() - a.pdif;
                delete a.pdif;
                animations[a.id] = a;
                frame();
            },
            update = function () {
                var a = this,
                    res;
                if (isArray(a.start)) {
                    res = [];
                    for (var j = 0, jj = a.start.length; j < jj; j++) {
                        res[j] = +a.start[j] +
                            (a.end[j] - a.start[j]) * a.easing(a.s);
                    }
                } else {
                    res = +a.start + (a.end - a.start) * a.easing(a.s);
                }
                a.set(res);
            },
            frame = function (timeStamp) {
                // Manual invokation?
                if (!timeStamp) {
                    // Frame loop stopped?
                    if (!requestID) {
                        // Start frame loop...
                        requestID = requestAnimFrame(frame);
                    }
                    return;
                }
                var len = 0;
                for (var i in animations) if (animations.hasOwnProperty(i)) {
                    var a = animations[i],
                        b = a.get(),
                        res;
                    len++;
                    a.s = (b - a.b) / (a.dur / a.spd);
                    if (a.s >= 1) {
                        delete animations[i];
                        a.s = 1;
                        len--;
                        (function (a) {
                            setTimeout(function () {
                                eve("mina.finish." + a.id, a);
                            });
                        }(a));
                    }
                    a.update();
                }
                requestID = len ? requestAnimFrame(frame) : false;
            },
            /*\
             * mina
             [ method ]
             **
             * Generic animation of numbers
             **
             - a (number) start _slave_ number
             - A (number) end _slave_ number
             - b (number) start _master_ number (start time in general case)
             - B (number) end _master_ number (end time in general case)
             - get (function) getter of _master_ number (see @mina.time)
             - set (function) setter of _slave_ number
             - easing (function) #optional easing function, default is @mina.linear
             = (object) animation descriptor
             o {
             o         id (string) animation id,
             o         start (number) start _slave_ number,
             o         end (number) end _slave_ number,
             o         b (number) start _master_ number,
             o         s (number) animation status (0..1),
             o         dur (number) animation duration,
             o         spd (number) animation speed,
             o         get (function) getter of _master_ number (see @mina.time),
             o         set (function) setter of _slave_ number,
             o         easing (function) easing function, default is @mina.linear,
             o         status (function) status getter/setter,
             o         speed (function) speed getter/setter,
             o         duration (function) duration getter/setter,
             o         stop (function) animation stopper
             o         pause (function) pauses the animation
             o         resume (function) resumes the animation
             o         update (function) calles setter with the right value of the animation
             o }
            \*/
            mina = function (a, A, b, B, get, set, easing) {
                var anim = {
                    id: ID(),
                    start: a,
                    end: A,
                    b: b,
                    s: 0,
                    dur: B - b,
                    spd: 1,
                    get: get,
                    set: set,
                    easing: easing || mina.linear,
                    status: sta,
                    speed: speed,
                    duration: duration,
                    stop: stopit,
                    pause: pause,
                    resume: resume,
                    update: update
                };
                animations[anim.id] = anim;
                var len = 0, i;
                for (i in animations) if (animations.hasOwnProperty(i)) {
                    len++;
                    if (len == 2) {
                        break;
                    }
                }
                len == 1 && frame();
                return anim;
            };
        /*\
         * mina.time
         [ method ]
         **
         * Returns the current time. Equivalent to:
         | function () {
         |     return (new Date).getTime();
         | }
        \*/
        mina.time = timer;
        /*\
         * mina.getById
         [ method ]
         **
         * Returns an animation by its id
         - id (string) animation's id
         = (object) See @mina
        \*/
        mina.getById = function (id) {
            return animations[id] || null;
        };

        /*\
         * mina.linear
         [ method ]
         **
         * Default linear easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.linear = function (n) {
            return n;
        };
        /*\
         * mina.easeout
         [ method ]
         **
         * Easeout easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.easeout = function (n) {
            return Math.pow(n, 1.7);
        };
        /*\
         * mina.easein
         [ method ]
         **
         * Easein easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.easein = function (n) {
            return Math.pow(n, .48);
        };
        /*\
         * mina.easeinout
         [ method ]
         **
         * Easeinout easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.easeinout = function (n) {
            if (n == 1) {
                return 1;
            }
            if (n == 0) {
                return 0;
            }
            var q = .48 - n / 1.04,
                Q = Math.sqrt(.1734 + q * q),
                x = Q - q,
                X = Math.pow(Math.abs(x), 1 / 3) * (x < 0 ? -1 : 1),
                y = -Q - q,
                Y = Math.pow(Math.abs(y), 1 / 3) * (y < 0 ? -1 : 1),
                t = X + Y + .5;
            return (1 - t) * 3 * t * t + t * t * t;
        };
        /*\
         * mina.backin
         [ method ]
         **
         * Backin easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.backin = function (n) {
            if (n == 1) {
                return 1;
            }
            var s = 1.70158;
            return n * n * ((s + 1) * n - s);
        };
        /*\
         * mina.backout
         [ method ]
         **
         * Backout easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.backout = function (n) {
            if (n == 0) {
                return 0;
            }
            n = n - 1;
            var s = 1.70158;
            return n * n * ((s + 1) * n + s) + 1;
        };
        /*\
         * mina.elastic
         [ method ]
         **
         * Elastic easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.elastic = function (n) {
            if (n == !!n) {
                return n;
            }
            return Math.pow(2, -10 * n) * Math.sin((n - .075) *
                (2 * Math.PI) / .3) + 1;
        };
        /*\
         * mina.bounce
         [ method ]
         **
         * Bounce easing
         - n (number) input 0..1
         = (number) output 0..1
        \*/
        mina.bounce = function (n) {
            var s = 7.5625,
                p = 2.75,
                l;
            if (n < 1 / p) {
                l = s * n * n;
            } else {
                if (n < 2 / p) {
                    n -= 1.5 / p;
                    l = s * n * n + .75;
                } else {
                    if (n < 2.5 / p) {
                        n -= 2.25 / p;
                        l = s * n * n + .9375;
                    } else {
                        n -= 2.625 / p;
                        l = s * n * n + .984375;
                    }
                }
            }
            return l;
        };
        window.mina = mina;
        return mina;
    })(typeof eve == "undefined" ? function () { } : eve);

    // Copyright (c) 2013 - 2017 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.

    var Snap = (function (root) {
        Snap.version = "0.5.1";
        /*\
         * Snap
         [ method ]
         **
         * Creates a drawing surface or wraps existing SVG element.
         **
         - width (number|string) width of surface
         - height (number|string) height of surface
         * or
         - DOM (SVGElement) element to be wrapped into Snap structure
         * or
         - array (array) array of elements (will return set of elements)
         * or
         - query (string) CSS query selector
         = (object) @Element
        \*/
        function Snap(w, h) {
            if (w) {
                if (w.nodeType) {
                    return wrap(w);
                }
                if (is(w, "array") && Snap.set) {
                    return Snap.set.apply(Snap, w);
                }
                if (w instanceof Element) {
                    return w;
                }
                if (h == null) {
                    try {
                        w = glob.doc.querySelector(String(w));
                        return wrap(w);
                    } catch (e) {
                        return null;
                    }
                }
            }
            w = w == null ? "100%" : w;
            h = h == null ? "100%" : h;
            return new Paper(w, h);
        }
        Snap.toString = function () {
            return "Snap v" + this.version;
        };
        Snap._ = {};
        var glob = {
            win: root.window,
            doc: root.window.document
        };
        Snap._.glob = glob;
        var has = "hasOwnProperty",
            Str = String,
            toFloat = parseFloat,
            toInt = parseInt,
            math = Math,
            mmax = math.max,
            mmin = math.min,
            abs = math.abs,
            pow = math.pow,
            PI = math.PI,
            round = math.round,
            E = "",
            S = " ",
            objectToString = Object.prototype.toString,
            ISURL = /^url\(['"]?([^\)]+?)['"]?\)$/i,
            colourRegExp = /^\s*((#[a-f\d]{6})|(#[a-f\d]{3})|rgba?\(\s*([\d\.]+%?\s*,\s*[\d\.]+%?\s*,\s*[\d\.]+%?(?:\s*,\s*[\d\.]+%?)?)\s*\)|hsba?\(\s*([\d\.]+(?:deg|\xb0|%)?\s*,\s*[\d\.]+%?\s*,\s*[\d\.]+(?:%?\s*,\s*[\d\.]+)?%?)\s*\)|hsla?\(\s*([\d\.]+(?:deg|\xb0|%)?\s*,\s*[\d\.]+%?\s*,\s*[\d\.]+(?:%?\s*,\s*[\d\.]+)?%?)\s*\))\s*$/i,
            bezierrg = /^(?:cubic-)?bezier\(([^,]+),([^,]+),([^,]+),([^\)]+)\)/,
            separator = Snap._.separator = /[,\s]+/,
            whitespace = /[\s]/g,
            commaSpaces = /[\s]*,[\s]*/,
            hsrg = { hs: 1, rg: 1 },
            pathCommand = /([a-z])[\s,]*((-?\d*\.?\d*(?:e[\-+]?\d+)?[\s]*,?[\s]*)+)/ig,
            tCommand = /([rstm])[\s,]*((-?\d*\.?\d*(?:e[\-+]?\d+)?[\s]*,?[\s]*)+)/ig,
            pathValues = /(-?\d*\.?\d*(?:e[\-+]?\d+)?)[\s]*,?[\s]*/ig,
            idgen = 0,
            idprefix = "S" + (+new Date).toString(36),
            ID = function (el) {
                return (el && el.type ? el.type : E) + idprefix + (idgen++).toString(36);
            },
            xlink = "http://www.w3.org/1999/xlink",
            xmlns = "http://www.w3.org/2000/svg",
            hub = {},
            /*\
             * Snap.url
             [ method ]
             **
             * Wraps path into `"url('<path>')"`.
             - value (string) path
             = (string) wrapped path
            \*/
            URL = Snap.url = function (url) {
                return "url('#" + url + "')";
            };

        function $(el, attr) {
            if (attr) {
                if (el == "#text") {
                    el = glob.doc.createTextNode(attr.text || attr["#text"] || "");
                }
                if (el == "#comment") {
                    el = glob.doc.createComment(attr.text || attr["#text"] || "");
                }
                if (typeof el == "string") {
                    el = $(el);
                }
                if (typeof attr == "string") {
                    if (el.nodeType == 1) {
                        if (attr.substring(0, 6) == "xlink:") {
                            return el.getAttributeNS(xlink, attr.substring(6));
                        }
                        if (attr.substring(0, 4) == "xml:") {
                            return el.getAttributeNS(xmlns, attr.substring(4));
                        }
                        return el.getAttribute(attr);
                    } else if (attr == "text") {
                        return el.nodeValue;
                    } else {
                        return null;
                    }
                }
                if (el.nodeType == 1) {
                    for (var key in attr) if (attr[has](key)) {
                        var val = Str(attr[key]);
                        if (val) {
                            if (key.substring(0, 6) == "xlink:") {
                                el.setAttributeNS(xlink, key.substring(6), val);
                            } else if (key.substring(0, 4) == "xml:") {
                                el.setAttributeNS(xmlns, key.substring(4), val);
                            } else {
                                el.setAttribute(key, val);
                            }
                        } else {
                            el.removeAttribute(key);
                        }
                    }
                } else if ("text" in attr) {
                    el.nodeValue = attr.text;
                }
            } else {
                el = glob.doc.createElementNS(xmlns, el);
            }
            return el;
        }
        Snap._.$ = $;
        Snap._.id = ID;
        function getAttrs(el) {
            var attrs = el.attributes,
                name,
                out = {};
            for (var i = 0; i < attrs.length; i++) {
                if (attrs[i].namespaceURI == xlink) {
                    name = "xlink:";
                } else {
                    name = "";
                }
                name += attrs[i].name;
                out[name] = attrs[i].textContent;
            }
            return out;
        }
        function is(o, type) {
            type = Str.prototype.toLowerCase.call(type);
            if (type == "finite") {
                return isFinite(o);
            }
            if (type == "array" &&
                (o instanceof Array || Array.isArray && Array.isArray(o))) {
                return true;
            }
            return type == "null" && o === null ||
                type == typeof o && o !== null ||
                type == "object" && o === Object(o) ||
                objectToString.call(o).slice(8, -1).toLowerCase() == type;
        }
        /*\
         * Snap.format
         [ method ]
         **
         * Replaces construction of type `{<name>}` to the corresponding argument
         **
         - token (string) string to format
         - json (object) object which properties are used as a replacement
         = (string) formatted string
         > Usage
         | // this draws a rectangular shape equivalent to "M10,20h40v50h-40z"
         | paper.path(Snap.format("M{x},{y}h{dim.width}v{dim.height}h{dim['negative width']}z", {
         |     x: 10,
         |     y: 20,
         |     dim: {
         |         width: 40,
         |         height: 50,
         |         "negative width": -40
         |     }
         | }));
        \*/
        Snap.format = (function () {
            var tokenRegex = /\{([^\}]+)\}/g,
                objNotationRegex = /(?:(?:^|\.)(.+?)(?=\[|\.|$|\()|\[('|")(.+?)\2\])(\(\))?/g, // matches .xxxxx or ["xxxxx"] to run over object properties
                replacer = function (all, key, obj) {
                    var res = obj;
                    key.replace(objNotationRegex, function (all, name, quote, quotedName, isFunc) {
                        name = name || quotedName;
                        if (res) {
                            if (name in res) {
                                res = res[name];
                            }
                            typeof res == "function" && isFunc && (res = res());
                        }
                    });
                    res = (res == null || res == obj ? all : res) + "";
                    return res;
                };
            return function (str, obj) {
                return Str(str).replace(tokenRegex, function (all, key) {
                    return replacer(all, key, obj);
                });
            };
        })();
        function clone(obj) {
            if (typeof obj == "function" || Object(obj) !== obj) {
                return obj;
            }
            var res = new obj.constructor;
            for (var key in obj) if (obj[has](key)) {
                res[key] = clone(obj[key]);
            }
            return res;
        }
        Snap._.clone = clone;
        function repush(array, item) {
            for (var i = 0, ii = array.length; i < ii; i++) if (array[i] === item) {
                return array.push(array.splice(i, 1)[0]);
            }
        }
        function cacher(f, scope, postprocessor) {
            function newf() {
                var arg = Array.prototype.slice.call(arguments, 0),
                    args = arg.join("\u2400"),
                    cache = newf.cache = newf.cache || {},
                    count = newf.count = newf.count || [];
                if (cache[has](args)) {
                    repush(count, args);
                    return postprocessor ? postprocessor(cache[args]) : cache[args];
                }
                count.length >= 1e3 && delete cache[count.shift()];
                count.push(args);
                cache[args] = f.apply(scope, arg);
                return postprocessor ? postprocessor(cache[args]) : cache[args];
            }
            return newf;
        }
        Snap._.cacher = cacher;
        function angle(x1, y1, x2, y2, x3, y3) {
            if (x3 == null) {
                var x = x1 - x2,
                    y = y1 - y2;
                if (!x && !y) {
                    return 0;
                }
                return (180 + math.atan2(-y, -x) * 180 / PI + 360) % 360;
            } else {
                return angle(x1, y1, x3, y3) - angle(x2, y2, x3, y3);
            }
        }
        function rad(deg) {
            return deg % 360 * PI / 180;
        }
        function deg(rad) {
            return rad * 180 / PI % 360;
        }
        function x_y() {
            return this.x + S + this.y;
        }
        function x_y_w_h() {
            return this.x + S + this.y + S + this.width + " \xd7 " + this.height;
        }

        /*\
         * Snap.rad
         [ method ]
         **
         * Transform angle to radians
         - deg (number) angle in degrees
         = (number) angle in radians
        \*/
        Snap.rad = rad;
        /*\
         * Snap.deg
         [ method ]
         **
         * Transform angle to degrees
         - rad (number) angle in radians
         = (number) angle in degrees
        \*/
        Snap.deg = deg;
        /*\
         * Snap.sin
         [ method ]
         **
         * Equivalent to `Math.sin()` only works with degrees, not radians.
         - angle (number) angle in degrees
         = (number) sin
        \*/
        Snap.sin = function (angle) {
            return math.sin(Snap.rad(angle));
        };
        /*\
         * Snap.tan
         [ method ]
         **
         * Equivalent to `Math.tan()` only works with degrees, not radians.
         - angle (number) angle in degrees
         = (number) tan
        \*/
        Snap.tan = function (angle) {
            return math.tan(Snap.rad(angle));
        };
        /*\
         * Snap.cos
         [ method ]
         **
         * Equivalent to `Math.cos()` only works with degrees, not radians.
         - angle (number) angle in degrees
         = (number) cos
        \*/
        Snap.cos = function (angle) {
            return math.cos(Snap.rad(angle));
        };
        /*\
         * Snap.asin
         [ method ]
         **
         * Equivalent to `Math.asin()` only works with degrees, not radians.
         - num (number) value
         = (number) asin in degrees
        \*/
        Snap.asin = function (num) {
            return Snap.deg(math.asin(num));
        };
        /*\
         * Snap.acos
         [ method ]
         **
         * Equivalent to `Math.acos()` only works with degrees, not radians.
         - num (number) value
         = (number) acos in degrees
        \*/
        Snap.acos = function (num) {
            return Snap.deg(math.acos(num));
        };
        /*\
         * Snap.atan
         [ method ]
         **
         * Equivalent to `Math.atan()` only works with degrees, not radians.
         - num (number) value
         = (number) atan in degrees
        \*/
        Snap.atan = function (num) {
            return Snap.deg(math.atan(num));
        };
        /*\
         * Snap.atan2
         [ method ]
         **
         * Equivalent to `Math.atan2()` only works with degrees, not radians.
         - num (number) value
         = (number) atan2 in degrees
        \*/
        Snap.atan2 = function (num) {
            return Snap.deg(math.atan2(num));
        };
        /*\
         * Snap.angle
         [ method ]
         **
         * Returns an angle between two or three points
         - x1 (number) x coord of first point
         - y1 (number) y coord of first point
         - x2 (number) x coord of second point
         - y2 (number) y coord of second point
         - x3 (number) #optional x coord of third point
         - y3 (number) #optional y coord of third point
         = (number) angle in degrees
        \*/
        Snap.angle = angle;
        /*\
         * Snap.len
         [ method ]
         **
         * Returns distance between two points
         - x1 (number) x coord of first point
         - y1 (number) y coord of first point
         - x2 (number) x coord of second point
         - y2 (number) y coord of second point
         = (number) distance
        \*/
        Snap.len = function (x1, y1, x2, y2) {
            return Math.sqrt(Snap.len2(x1, y1, x2, y2));
        };
        /*\
         * Snap.len2
         [ method ]
         **
         * Returns squared distance between two points
         - x1 (number) x coord of first point
         - y1 (number) y coord of first point
         - x2 (number) x coord of second point
         - y2 (number) y coord of second point
         = (number) distance
        \*/
        Snap.len2 = function (x1, y1, x2, y2) {
            return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
        };
        /*\
         * Snap.closestPoint
         [ method ]
         **
         * Returns closest point to a given one on a given path.
         - path (Element) path element
         - x (number) x coord of a point
         - y (number) y coord of a point
         = (object) in format
         {
            x (number) x coord of the point on the path
            y (number) y coord of the point on the path
            length (number) length of the path to the point
            distance (number) distance from the given point to the path
         }
        \*/
        // Copied from http://bl.ocks.org/mbostock/8027637
        Snap.closestPoint = function (path, x, y) {
            function distance2(p) {
                var dx = p.x - x,
                    dy = p.y - y;
                return dx * dx + dy * dy;
            }
            var pathNode = path.node,
                pathLength = pathNode.getTotalLength(),
                precision = pathLength / pathNode.pathSegList.numberOfItems * .125,
                best,
                bestLength,
                bestDistance = Infinity;

            // linear scan for coarse approximation
            for (var scan, scanLength = 0, scanDistance; scanLength <= pathLength; scanLength += precision) {
                if ((scanDistance = distance2(scan = pathNode.getPointAtLength(scanLength))) < bestDistance) {
                    best = scan;
                    bestLength = scanLength;
                    bestDistance = scanDistance;
                }
            }

            // binary search for precise estimate
            precision *= .5;
            while (precision > .5) {
                var before,
                    after,
                    beforeLength,
                    afterLength,
                    beforeDistance,
                    afterDistance;
                if ((beforeLength = bestLength - precision) >= 0 && (beforeDistance = distance2(before = pathNode.getPointAtLength(beforeLength))) < bestDistance) {
                    best = before;
                    bestLength = beforeLength;
                    bestDistance = beforeDistance;
                } else if ((afterLength = bestLength + precision) <= pathLength && (afterDistance = distance2(after = pathNode.getPointAtLength(afterLength))) < bestDistance) {
                    best = after;
                    bestLength = afterLength;
                    bestDistance = afterDistance;
                } else {
                    precision *= .5;
                }
            }

            best = {
                x: best.x,
                y: best.y,
                length: bestLength,
                distance: Math.sqrt(bestDistance)
            };
            return best;
        }
        /*\
         * Snap.is
         [ method ]
         **
         * Handy replacement for the `typeof` operator
         - o (…) any object or primitive
         - type (string) name of the type, e.g., `string`, `function`, `number`, etc.
         = (boolean) `true` if given value is of given type
        \*/
        Snap.is = is;
        /*\
         * Snap.snapTo
         [ method ]
         **
         * Snaps given value to given grid
         - values (array|number) given array of values or step of the grid
         - value (number) value to adjust
         - tolerance (number) #optional maximum distance to the target value that would trigger the snap. Default is `10`.
         = (number) adjusted value
        \*/
        Snap.snapTo = function (values, value, tolerance) {
            tolerance = is(tolerance, "finite") ? tolerance : 10;
            if (is(values, "array")) {
                var i = values.length;
                while (i--) if (abs(values[i] - value) <= tolerance) {
                    return values[i];
                }
            } else {
                values = +values;
                var rem = value % values;
                if (rem < tolerance) {
                    return value - rem;
                }
                if (rem > values - tolerance) {
                    return value - rem + values;
                }
            }
            return value;
        };
        // Colour
        /*\
         * Snap.getRGB
         [ method ]
         **
         * Parses color string as RGB object
         - color (string) color string in one of the following formats:
         # <ul>
         #     <li>Color name (<code>red</code>, <code>green</code>, <code>cornflowerblue</code>, etc)</li>
         #     <li>#••• — shortened HTML color: (<code>#000</code>, <code>#fc0</code>, etc.)</li>
         #     <li>#•••••• — full length HTML color: (<code>#000000</code>, <code>#bd2300</code>)</li>
         #     <li>rgb(•••, •••, •••) — red, green and blue channels values: (<code>rgb(200,&nbsp;100,&nbsp;0)</code>)</li>
         #     <li>rgba(•••, •••, •••, •••) — also with opacity</li>
         #     <li>rgb(•••%, •••%, •••%) — same as above, but in %: (<code>rgb(100%,&nbsp;175%,&nbsp;0%)</code>)</li>
         #     <li>rgba(•••%, •••%, •••%, •••%) — also with opacity</li>
         #     <li>hsb(•••, •••, •••) — hue, saturation and brightness values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;1)</code>)</li>
         #     <li>hsba(•••, •••, •••, •••) — also with opacity</li>
         #     <li>hsb(•••%, •••%, •••%) — same as above, but in %</li>
         #     <li>hsba(•••%, •••%, •••%, •••%) — also with opacity</li>
         #     <li>hsl(•••, •••, •••) — hue, saturation and luminosity values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;0.5)</code>)</li>
         #     <li>hsla(•••, •••, •••, •••) — also with opacity</li>
         #     <li>hsl(•••%, •••%, •••%) — same as above, but in %</li>
         #     <li>hsla(•••%, •••%, •••%, •••%) — also with opacity</li>
         # </ul>
         * Note that `%` can be used any time: `rgb(20%, 255, 50%)`.
         = (object) RGB object in the following format:
         o {
         o     r (number) red,
         o     g (number) green,
         o     b (number) blue,
         o     hex (string) color in HTML/CSS format: #••••••,
         o     error (boolean) true if string can't be parsed
         o }
        \*/
        Snap.getRGB = cacher(function (colour) {
            if (!colour || !!((colour = Str(colour)).indexOf("-") + 1)) {
                return { r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString };
            }
            if (colour == "none") {
                return { r: -1, g: -1, b: -1, hex: "none", toString: rgbtoString };
            }
            !(hsrg[has](colour.toLowerCase().substring(0, 2)) || colour.charAt() == "#") && (colour = toHex(colour));
            if (!colour) {
                return { r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString };
            }
            var res,
                red,
                green,
                blue,
                opacity,
                t,
                values,
                rgb = colour.match(colourRegExp);
            if (rgb) {
                if (rgb[2]) {
                    blue = toInt(rgb[2].substring(5), 16);
                    green = toInt(rgb[2].substring(3, 5), 16);
                    red = toInt(rgb[2].substring(1, 3), 16);
                }
                if (rgb[3]) {
                    blue = toInt((t = rgb[3].charAt(3)) + t, 16);
                    green = toInt((t = rgb[3].charAt(2)) + t, 16);
                    red = toInt((t = rgb[3].charAt(1)) + t, 16);
                }
                if (rgb[4]) {
                    values = rgb[4].split(commaSpaces);
                    red = toFloat(values[0]);
                    values[0].slice(-1) == "%" && (red *= 2.55);
                    green = toFloat(values[1]);
                    values[1].slice(-1) == "%" && (green *= 2.55);
                    blue = toFloat(values[2]);
                    values[2].slice(-1) == "%" && (blue *= 2.55);
                    rgb[1].toLowerCase().slice(0, 4) == "rgba" && (opacity = toFloat(values[3]));
                    values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
                }
                if (rgb[5]) {
                    values = rgb[5].split(commaSpaces);
                    red = toFloat(values[0]);
                    values[0].slice(-1) == "%" && (red /= 100);
                    green = toFloat(values[1]);
                    values[1].slice(-1) == "%" && (green /= 100);
                    blue = toFloat(values[2]);
                    values[2].slice(-1) == "%" && (blue /= 100);
                    (values[0].slice(-3) == "deg" || values[0].slice(-1) == "\xb0") && (red /= 360);
                    rgb[1].toLowerCase().slice(0, 4) == "hsba" && (opacity = toFloat(values[3]));
                    values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
                    return Snap.hsb2rgb(red, green, blue, opacity);
                }
                if (rgb[6]) {
                    values = rgb[6].split(commaSpaces);
                    red = toFloat(values[0]);
                    values[0].slice(-1) == "%" && (red /= 100);
                    green = toFloat(values[1]);
                    values[1].slice(-1) == "%" && (green /= 100);
                    blue = toFloat(values[2]);
                    values[2].slice(-1) == "%" && (blue /= 100);
                    (values[0].slice(-3) == "deg" || values[0].slice(-1) == "\xb0") && (red /= 360);
                    rgb[1].toLowerCase().slice(0, 4) == "hsla" && (opacity = toFloat(values[3]));
                    values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
                    return Snap.hsl2rgb(red, green, blue, opacity);
                }
                red = mmin(math.round(red), 255);
                green = mmin(math.round(green), 255);
                blue = mmin(math.round(blue), 255);
                opacity = mmin(mmax(opacity, 0), 1);
                rgb = { r: red, g: green, b: blue, toString: rgbtoString };
                rgb.hex = "#" + (16777216 | blue | green << 8 | red << 16).toString(16).slice(1);
                rgb.opacity = is(opacity, "finite") ? opacity : 1;
                return rgb;
            }
            return { r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString };
        }, Snap);
        /*\
         * Snap.hsb
         [ method ]
         **
         * Converts HSB values to a hex representation of the color
         - h (number) hue
         - s (number) saturation
         - b (number) value or brightness
         = (string) hex representation of the color
        \*/
        Snap.hsb = cacher(function (h, s, b) {
            return Snap.hsb2rgb(h, s, b).hex;
        });
        /*\
         * Snap.hsl
         [ method ]
         **
         * Converts HSL values to a hex representation of the color
         - h (number) hue
         - s (number) saturation
         - l (number) luminosity
         = (string) hex representation of the color
        \*/
        Snap.hsl = cacher(function (h, s, l) {
            return Snap.hsl2rgb(h, s, l).hex;
        });
        /*\
         * Snap.rgb
         [ method ]
         **
         * Converts RGB values to a hex representation of the color
         - r (number) red
         - g (number) green
         - b (number) blue
         = (string) hex representation of the color
        \*/
        Snap.rgb = cacher(function (r, g, b, o) {
            if (is(o, "finite")) {
                var round = math.round;
                return "rgba(" + [round(r), round(g), round(b), +o.toFixed(2)] + ")";
            }
            return "#" + (16777216 | b | g << 8 | r << 16).toString(16).slice(1);
        });
        var toHex = function (color) {
            var i = glob.doc.getElementsByTagName("head")[0] || glob.doc.getElementsByTagName("svg")[0],
                red = "rgb(255, 0, 0)";
            toHex = cacher(function (color) {
                if (color.toLowerCase() == "red") {
                    return red;
                }
                i.style.color = red;
                i.style.color = color;
                var out = glob.doc.defaultView.getComputedStyle(i, E).getPropertyValue("color");
                return out == red ? null : out;
            });
            return toHex(color);
        },
            hsbtoString = function () {
                return "hsb(" + [this.h, this.s, this.b] + ")";
            },
            hsltoString = function () {
                return "hsl(" + [this.h, this.s, this.l] + ")";
            },
            rgbtoString = function () {
                return this.opacity == 1 || this.opacity == null ?
                    this.hex :
                    "rgba(" + [this.r, this.g, this.b, this.opacity] + ")";
            },
            prepareRGB = function (r, g, b) {
                if (g == null && is(r, "object") && "r" in r && "g" in r && "b" in r) {
                    b = r.b;
                    g = r.g;
                    r = r.r;
                }
                if (g == null && is(r, string)) {
                    var clr = Snap.getRGB(r);
                    r = clr.r;
                    g = clr.g;
                    b = clr.b;
                }
                if (r > 1 || g > 1 || b > 1) {
                    r /= 255;
                    g /= 255;
                    b /= 255;
                }

                return [r, g, b];
            },
            packageRGB = function (r, g, b, o) {
                r = math.round(r * 255);
                g = math.round(g * 255);
                b = math.round(b * 255);
                var rgb = {
                    r: r,
                    g: g,
                    b: b,
                    opacity: is(o, "finite") ? o : 1,
                    hex: Snap.rgb(r, g, b),
                    toString: rgbtoString
                };
                is(o, "finite") && (rgb.opacity = o);
                return rgb;
            };
        /*\
         * Snap.color
         [ method ]
         **
         * Parses the color string and returns an object featuring the color's component values
         - clr (string) color string in one of the supported formats (see @Snap.getRGB)
         = (object) Combined RGB/HSB object in the following format:
         o {
         o     r (number) red,
         o     g (number) green,
         o     b (number) blue,
         o     hex (string) color in HTML/CSS format: #••••••,
         o     error (boolean) `true` if string can't be parsed,
         o     h (number) hue,
         o     s (number) saturation,
         o     v (number) value (brightness),
         o     l (number) lightness
         o }
        \*/
        Snap.color = function (clr) {
            var rgb;
            if (is(clr, "object") && "h" in clr && "s" in clr && "b" in clr) {
                rgb = Snap.hsb2rgb(clr);
                clr.r = rgb.r;
                clr.g = rgb.g;
                clr.b = rgb.b;
                clr.opacity = 1;
                clr.hex = rgb.hex;
            } else if (is(clr, "object") && "h" in clr && "s" in clr && "l" in clr) {
                rgb = Snap.hsl2rgb(clr);
                clr.r = rgb.r;
                clr.g = rgb.g;
                clr.b = rgb.b;
                clr.opacity = 1;
                clr.hex = rgb.hex;
            } else {
                if (is(clr, "string")) {
                    clr = Snap.getRGB(clr);
                }
                if (is(clr, "object") && "r" in clr && "g" in clr && "b" in clr && !("error" in clr)) {
                    rgb = Snap.rgb2hsl(clr);
                    clr.h = rgb.h;
                    clr.s = rgb.s;
                    clr.l = rgb.l;
                    rgb = Snap.rgb2hsb(clr);
                    clr.v = rgb.b;
                } else {
                    clr = { hex: "none" };
                    clr.r = clr.g = clr.b = clr.h = clr.s = clr.v = clr.l = -1;
                    clr.error = 1;
                }
            }
            clr.toString = rgbtoString;
            return clr;
        };
        /*\
         * Snap.hsb2rgb
         [ method ]
         **
         * Converts HSB values to an RGB object
         - h (number) hue
         - s (number) saturation
         - v (number) value or brightness
         = (object) RGB object in the following format:
         o {
         o     r (number) red,
         o     g (number) green,
         o     b (number) blue,
         o     hex (string) color in HTML/CSS format: #••••••
         o }
        \*/
        Snap.hsb2rgb = function (h, s, v, o) {
            if (is(h, "object") && "h" in h && "s" in h && "b" in h) {
                v = h.b;
                s = h.s;
                o = h.o;
                h = h.h;
            }
            h *= 360;
            var R, G, B, X, C;
            h = h % 360 / 60;
            C = v * s;
            X = C * (1 - abs(h % 2 - 1));
            R = G = B = v - C;

            h = ~~h;
            R += [C, X, 0, 0, X, C][h];
            G += [X, C, C, X, 0, 0][h];
            B += [0, 0, X, C, C, X][h];
            return packageRGB(R, G, B, o);
        };
        /*\
         * Snap.hsl2rgb
         [ method ]
         **
         * Converts HSL values to an RGB object
         - h (number) hue
         - s (number) saturation
         - l (number) luminosity
         = (object) RGB object in the following format:
         o {
         o     r (number) red,
         o     g (number) green,
         o     b (number) blue,
         o     hex (string) color in HTML/CSS format: #••••••
         o }
        \*/
        Snap.hsl2rgb = function (h, s, l, o) {
            if (is(h, "object") && "h" in h && "s" in h && "l" in h) {
                l = h.l;
                s = h.s;
                h = h.h;
            }
            if (h > 1 || s > 1 || l > 1) {
                h /= 360;
                s /= 100;
                l /= 100;
            }
            h *= 360;
            var R, G, B, X, C;
            h = h % 360 / 60;
            C = 2 * s * (l < .5 ? l : 1 - l);
            X = C * (1 - abs(h % 2 - 1));
            R = G = B = l - C / 2;

            h = ~~h;
            R += [C, X, 0, 0, X, C][h];
            G += [X, C, C, X, 0, 0][h];
            B += [0, 0, X, C, C, X][h];
            return packageRGB(R, G, B, o);
        };
        /*\
         * Snap.rgb2hsb
         [ method ]
         **
         * Converts RGB values to an HSB object
         - r (number) red
         - g (number) green
         - b (number) blue
         = (object) HSB object in the following format:
         o {
         o     h (number) hue,
         o     s (number) saturation,
         o     b (number) brightness
         o }
        \*/
        Snap.rgb2hsb = function (r, g, b) {
            b = prepareRGB(r, g, b);
            r = b[0];
            g = b[1];
            b = b[2];

            var H, S, V, C;
            V = mmax(r, g, b);
            C = V - mmin(r, g, b);
            H = C == 0 ? null :
                V == r ? (g - b) / C :
                    V == g ? (b - r) / C + 2 :
                        (r - g) / C + 4;
            H = (H + 360) % 6 * 60 / 360;
            S = C == 0 ? 0 : C / V;
            return { h: H, s: S, b: V, toString: hsbtoString };
        };
        /*\
         * Snap.rgb2hsl
         [ method ]
         **
         * Converts RGB values to an HSL object
         - r (number) red
         - g (number) green
         - b (number) blue
         = (object) HSL object in the following format:
         o {
         o     h (number) hue,
         o     s (number) saturation,
         o     l (number) luminosity
         o }
        \*/
        Snap.rgb2hsl = function (r, g, b) {
            b = prepareRGB(r, g, b);
            r = b[0];
            g = b[1];
            b = b[2];

            var H, S, L, M, m, C;
            M = mmax(r, g, b);
            m = mmin(r, g, b);
            C = M - m;
            H = C == 0 ? null :
                M == r ? (g - b) / C :
                    M == g ? (b - r) / C + 2 :
                        (r - g) / C + 4;
            H = (H + 360) % 6 * 60 / 360;
            L = (M + m) / 2;
            S = C == 0 ? 0 :
                L < .5 ? C / (2 * L) :
                    C / (2 - 2 * L);
            return { h: H, s: S, l: L, toString: hsltoString };
        };

        // Transformations
        /*\
         * Snap.parsePathString
         [ method ]
         **
         * Utility method
         **
         * Parses given path string into an array of arrays of path segments
         - pathString (string|array) path string or array of segments (in the last case it is returned straight away)
         = (array) array of segments
        \*/
        Snap.parsePathString = function (pathString) {
            if (!pathString) {
                return null;
            }
            var pth = Snap.path(pathString);
            if (pth.arr) {
                return Snap.path.clone(pth.arr);
            }

            var paramCounts = { a: 7, c: 6, o: 2, h: 1, l: 2, m: 2, r: 4, q: 4, s: 4, t: 2, v: 1, u: 3, z: 0 },
                data = [];
            if (is(pathString, "array") && is(pathString[0], "array")) { // rough assumption
                data = Snap.path.clone(pathString);
            }
            if (!data.length) {
                Str(pathString).replace(pathCommand, function (a, b, c) {
                    var params = [],
                        name = b.toLowerCase();
                    c.replace(pathValues, function (a, b) {
                        b && params.push(+b);
                    });
                    if (name == "m" && params.length > 2) {
                        data.push([b].concat(params.splice(0, 2)));
                        name = "l";
                        b = b == "m" ? "l" : "L";
                    }
                    if (name == "o" && params.length == 1) {
                        data.push([b, params[0]]);
                    }
                    if (name == "r") {
                        data.push([b].concat(params));
                    } else while (params.length >= paramCounts[name]) {
                        data.push([b].concat(params.splice(0, paramCounts[name])));
                        if (!paramCounts[name]) {
                            break;
                        }
                    }
                });
            }
            data.toString = Snap.path.toString;
            pth.arr = Snap.path.clone(data);
            return data;
        };
        /*\
         * Snap.parseTransformString
         [ method ]
         **
         * Utility method
         **
         * Parses given transform string into an array of transformations
         - TString (string|array) transform string or array of transformations (in the last case it is returned straight away)
         = (array) array of transformations
        \*/
        var parseTransformString = Snap.parseTransformString = function (TString) {
            if (!TString) {
                return null;
            }
            var paramCounts = { r: 3, s: 4, t: 2, m: 6 },
                data = [];
            if (is(TString, "array") && is(TString[0], "array")) { // rough assumption
                data = Snap.path.clone(TString);
            }
            if (!data.length) {
                Str(TString).replace(tCommand, function (a, b, c) {
                    var params = [],
                        name = b.toLowerCase();
                    c.replace(pathValues, function (a, b) {
                        b && params.push(+b);
                    });
                    data.push([b].concat(params));
                });
            }
            data.toString = Snap.path.toString;
            return data;
        };
        function svgTransform2string(tstr) {
            var res = [];
            tstr = tstr.replace(/(?:^|\s)(\w+)\(([^)]+)\)/g, function (all, name, params) {
                params = params.split(/\s*,\s*|\s+/);
                if (name == "rotate" && params.length == 1) {
                    params.push(0, 0);
                }
                if (name == "scale") {
                    if (params.length > 2) {
                        params = params.slice(0, 2);
                    } else if (params.length == 2) {
                        params.push(0, 0);
                    }
                    if (params.length == 1) {
                        params.push(params[0], 0, 0);
                    }
                }
                if (name == "skewX") {
                    res.push(["m", 1, 0, math.tan(rad(params[0])), 1, 0, 0]);
                } else if (name == "skewY") {
                    res.push(["m", 1, math.tan(rad(params[0])), 0, 1, 0, 0]);
                } else {
                    res.push([name.charAt(0)].concat(params));
                }
                return all;
            });
            return res;
        }
        Snap._.svgTransform2string = svgTransform2string;
        Snap._.rgTransform = /^[a-z][\s]*-?\.?\d/i;
        function transform2matrix(tstr, bbox) {
            var tdata = parseTransformString(tstr),
                m = new Snap.Matrix;
            if (tdata) {
                for (var i = 0, ii = tdata.length; i < ii; i++) {
                    var t = tdata[i],
                        tlen = t.length,
                        command = Str(t[0]).toLowerCase(),
                        absolute = t[0] != command,
                        inver = absolute ? m.invert() : 0,
                        x1,
                        y1,
                        x2,
                        y2,
                        bb;
                    if (command == "t" && tlen == 2) {
                        m.translate(t[1], 0);
                    } else if (command == "t" && tlen == 3) {
                        if (absolute) {
                            x1 = inver.x(0, 0);
                            y1 = inver.y(0, 0);
                            x2 = inver.x(t[1], t[2]);
                            y2 = inver.y(t[1], t[2]);
                            m.translate(x2 - x1, y2 - y1);
                        } else {
                            m.translate(t[1], t[2]);
                        }
                    } else if (command == "r") {
                        if (tlen == 2) {
                            bb = bb || bbox;
                            m.rotate(t[1], bb.x + bb.width / 2, bb.y + bb.height / 2);
                        } else if (tlen == 4) {
                            if (absolute) {
                                x2 = inver.x(t[2], t[3]);
                                y2 = inver.y(t[2], t[3]);
                                m.rotate(t[1], x2, y2);
                            } else {
                                m.rotate(t[1], t[2], t[3]);
                            }
                        }
                    } else if (command == "s") {
                        if (tlen == 2 || tlen == 3) {
                            bb = bb || bbox;
                            m.scale(t[1], t[tlen - 1], bb.x + bb.width / 2, bb.y + bb.height / 2);
                        } else if (tlen == 4) {
                            if (absolute) {
                                x2 = inver.x(t[2], t[3]);
                                y2 = inver.y(t[2], t[3]);
                                m.scale(t[1], t[1], x2, y2);
                            } else {
                                m.scale(t[1], t[1], t[2], t[3]);
                            }
                        } else if (tlen == 5) {
                            if (absolute) {
                                x2 = inver.x(t[3], t[4]);
                                y2 = inver.y(t[3], t[4]);
                                m.scale(t[1], t[2], x2, y2);
                            } else {
                                m.scale(t[1], t[2], t[3], t[4]);
                            }
                        }
                    } else if (command == "m" && tlen == 7) {
                        m.add(t[1], t[2], t[3], t[4], t[5], t[6]);
                    }
                }
            }
            return m;
        }
        Snap._.transform2matrix = transform2matrix;
        Snap._unit2px = unit2px;
        var contains = glob.doc.contains || glob.doc.compareDocumentPosition ?
            function (a, b) {
                var adown = a.nodeType == 9 ? a.documentElement : a,
                    bup = b && b.parentNode;
                return a == bup || !!(bup && bup.nodeType == 1 && (
                    adown.contains ?
                        adown.contains(bup) :
                        a.compareDocumentPosition && a.compareDocumentPosition(bup) & 16
                ));
            } :
            function (a, b) {
                if (b) {
                    while (b) {
                        b = b.parentNode;
                        if (b == a) {
                            return true;
                        }
                    }
                }
                return false;
            };
        function getSomeDefs(el) {
            var p = el.node.ownerSVGElement && wrap(el.node.ownerSVGElement) ||
                el.node.parentNode && wrap(el.node.parentNode) ||
                Snap.select("svg") ||
                Snap(0, 0),
                pdefs = p.select("defs"),
                defs = pdefs == null ? false : pdefs.node;
            if (!defs) {
                defs = make("defs", p.node).node;
            }
            return defs;
        }
        function getSomeSVG(el) {
            return el.node.ownerSVGElement && wrap(el.node.ownerSVGElement) || Snap.select("svg");
        }
        Snap._.getSomeDefs = getSomeDefs;
        Snap._.getSomeSVG = getSomeSVG;
        function unit2px(el, name, value) {
            var svg = getSomeSVG(el).node,
                out = {},
                mgr = svg.querySelector(".svg---mgr");
            if (!mgr) {
                mgr = $("rect");
                $(mgr, { x: -9e9, y: -9e9, width: 10, height: 10, "class": "svg---mgr", fill: "none" });
                svg.appendChild(mgr);
            }
            function getW(val) {
                if (val == null) {
                    return E;
                }
                if (val == +val) {
                    return val;
                }
                $(mgr, { width: val });
                try {
                    return mgr.getBBox().width;
                } catch (e) {
                    return 0;
                }
            }
            function getH(val) {
                if (val == null) {
                    return E;
                }
                if (val == +val) {
                    return val;
                }
                $(mgr, { height: val });
                try {
                    return mgr.getBBox().height;
                } catch (e) {
                    return 0;
                }
            }
            function set(nam, f) {
                if (name == null) {
                    out[nam] = f(el.attr(nam) || 0);
                } else if (nam == name) {
                    out = f(value == null ? el.attr(nam) || 0 : value);
                }
            }
            switch (el.type) {
                case "rect":
                    set("rx", getW);
                    set("ry", getH);
                case "image":
                    set("width", getW);
                    set("height", getH);
                case "text":
                    set("x", getW);
                    set("y", getH);
                    break;
                case "circle":
                    set("cx", getW);
                    set("cy", getH);
                    set("r", getW);
                    break;
                case "ellipse":
                    set("cx", getW);
                    set("cy", getH);
                    set("rx", getW);
                    set("ry", getH);
                    break;
                case "line":
                    set("x1", getW);
                    set("x2", getW);
                    set("y1", getH);
                    set("y2", getH);
                    break;
                case "marker":
                    set("refX", getW);
                    set("markerWidth", getW);
                    set("refY", getH);
                    set("markerHeight", getH);
                    break;
                case "radialGradient":
                    set("fx", getW);
                    set("fy", getH);
                    break;
                case "tspan":
                    set("dx", getW);
                    set("dy", getH);
                    break;
                default:
                    set(name, getW);
            }
            svg.removeChild(mgr);
            return out;
        }
        /*\
         * Snap.select
         [ method ]
         **
         * Wraps a DOM element specified by CSS selector as @Element
         - query (string) CSS selector of the element
         = (Element) the current element
        \*/
        Snap.select = function (query) {
            query = Str(query).replace(/([^\\]):/g, "$1\\:");
            return wrap(glob.doc.querySelector(query));
        };
        /*\
         * Snap.selectAll
         [ method ]
         **
         * Wraps DOM elements specified by CSS selector as set or array of @Element
         - query (string) CSS selector of the element
         = (Element) the current element
        \*/
        Snap.selectAll = function (query) {
            var nodelist = glob.doc.querySelectorAll(query),
                set = (Snap.set || Array)();
            for (var i = 0; i < nodelist.length; i++) {
                set.push(wrap(nodelist[i]));
            }
            return set;
        };

        function add2group(list) {
            if (!is(list, "array")) {
                list = Array.prototype.slice.call(arguments, 0);
            }
            var i = 0,
                j = 0,
                node = this.node;
            while (this[i]) delete this[i++];
            for (i = 0; i < list.length; i++) {
                if (list[i].type == "set") {
                    list[i].forEach(function (el) {
                        node.appendChild(el.node);
                    });
                } else {
                    node.appendChild(list[i].node);
                }
            }
            var children = node.childNodes;
            for (i = 0; i < children.length; i++) {
                this[j++] = wrap(children[i]);
            }
            return this;
        }
        // Hub garbage collector every 10s
        setInterval(function () {
            for (var key in hub) if (hub[has](key)) {
                var el = hub[key],
                    node = el.node;
                if (el.type != "svg" && !node.ownerSVGElement || el.type == "svg" && (!node.parentNode || "ownerSVGElement" in node.parentNode && !node.ownerSVGElement)) {
                    delete hub[key];
                }
            }
        }, 1e4);
        function Element(el) {
            if (el.snap in hub) {
                return hub[el.snap];
            }
            var svg;
            try {
                svg = el.ownerSVGElement;
            } catch (e) { }
            /*\
             * Element.node
             [ property (object) ]
             **
             * Gives you a reference to the DOM object, so you can assign event handlers or just mess around.
             > Usage
             | // draw a circle at coordinate 10,10 with radius of 10
             | var c = paper.circle(10, 10, 10);
             | c.node.onclick = function () {
             |     c.attr("fill", "red");
             | };
            \*/
            this.node = el;
            if (svg) {
                this.paper = new Paper(svg);
            }
            /*\
             * Element.type
             [ property (string) ]
             **
             * SVG tag name of the given element.
            \*/
            this.type = el.tagName || el.nodeName;
            var id = this.id = ID(this);
            this.anims = {};
            this._ = {
                transform: []
            };
            el.snap = id;
            hub[id] = this;
            if (this.type == "g") {
                this.add = add2group;
            }
            if (this.type in { g: 1, mask: 1, pattern: 1, symbol: 1 }) {
                for (var method in Paper.prototype) if (Paper.prototype[has](method)) {
                    this[method] = Paper.prototype[method];
                }
            }
        }
        /*\
          * Element.attr
          [ method ]
          **
          * Gets or sets given attributes of the element.
          **
          - params (object) contains key-value pairs of attributes you want to set
          * or
          - param (string) name of the attribute
          = (Element) the current element
          * or
          = (string) value of attribute
          > Usage
          | el.attr({
          |     fill: "#fc0",
          |     stroke: "#000",
          |     strokeWidth: 2, // CamelCase...
          |     "fill-opacity": 0.5, // or dash-separated names
          |     width: "*=2" // prefixed values
          | });
          | console.log(el.attr("fill")); // #fc0
          * Prefixed values in format `"+=10"` supported. All four operations
          * (`+`, `-`, `*` and `/`) could be used. Optionally you can use units for `+`
          * and `-`: `"+=2em"`.
         \*/
        Element.prototype.attr = function (params, value) {
            var el = this,
                node = el.node;
            if (!params) {
                if (node.nodeType != 1) {
                    return {
                        text: node.nodeValue
                    };
                }
                var attr = node.attributes,
                    out = {};
                for (var i = 0, ii = attr.length; i < ii; i++) {
                    out[attr[i].nodeName] = attr[i].nodeValue;
                }
                return out;
            }
            if (is(params, "string")) {
                if (arguments.length > 1) {
                    var json = {};
                    json[params] = value;
                    params = json;
                } else {
                    return eve("snap.util.getattr." + params, el).firstDefined();
                }
            }
            for (var att in params) {
                if (params[has](att)) {
                    eve("snap.util.attr." + att, el, params[att]);
                }
            }
            return el;
        };
        /*\
         * Snap.parse
         [ method ]
         **
         * Parses SVG fragment and converts it into a @Fragment
         **
         - svg (string) SVG string
         = (Fragment) the @Fragment
        \*/
        Snap.parse = function (svg) {
            var f = glob.doc.createDocumentFragment(),
                full = true,
                div = glob.doc.createElement("div");
            svg = Str(svg);
            if (!svg.match(/^\s*<\s*svg(?:\s|>)/)) {
                svg = "<svg>" + svg + "</svg>";
                full = false;
            }
            div.innerHTML = svg;
            svg = div.getElementsByTagName("svg")[0];
            if (svg) {
                if (full) {
                    f = svg;
                } else {
                    while (svg.firstChild) {
                        f.appendChild(svg.firstChild);
                    }
                }
            }
            return new Fragment(f);
        };
        function Fragment(frag) {
            this.node = frag;
        }
        /*\
         * Snap.fragment
         [ method ]
         **
         * Creates a DOM fragment from a given list of elements or strings
         **
         - varargs (…) SVG string
         = (Fragment) the @Fragment
        \*/
        Snap.fragment = function () {
            var args = Array.prototype.slice.call(arguments, 0),
                f = glob.doc.createDocumentFragment();
            for (var i = 0, ii = args.length; i < ii; i++) {
                var item = args[i];
                if (item.node && item.node.nodeType) {
                    f.appendChild(item.node);
                }
                if (item.nodeType) {
                    f.appendChild(item);
                }
                if (typeof item == "string") {
                    f.appendChild(Snap.parse(item).node);
                }
            }
            return new Fragment(f);
        };

        function make(name, parent) {
            var res = $(name);
            parent.appendChild(res);
            var el = wrap(res);
            return el;
        }
        function Paper(w, h) {
            var res,
                desc,
                defs,
                proto = Paper.prototype;
            if (w && w.tagName && w.tagName.toLowerCase() == "svg") {
                if (w.snap in hub) {
                    return hub[w.snap];
                }
                var doc = w.ownerDocument;
                res = new Element(w);
                desc = w.getElementsByTagName("desc")[0];
                defs = w.getElementsByTagName("defs")[0];
                if (!desc) {
                    desc = $("desc");
                    desc.appendChild(doc.createTextNode("Created with Snap"));
                    res.node.appendChild(desc);
                }
                if (!defs) {
                    defs = $("defs");
                    res.node.appendChild(defs);
                }
                res.defs = defs;
                for (var key in proto) if (proto[has](key)) {
                    res[key] = proto[key];
                }
                res.paper = res.root = res;
            } else {
                res = make("svg", glob.doc.body);
                $(res.node, {
                    height: h,
                    version: 1.1,
                    width: w,
                    xmlns: xmlns
                });
            }
            return res;
        }
        function wrap(dom) {
            if (!dom) {
                return dom;
            }
            if (dom instanceof Element || dom instanceof Fragment) {
                return dom;
            }
            if (dom.tagName && dom.tagName.toLowerCase() == "svg") {
                return new Paper(dom);
            }
            if (dom.tagName && dom.tagName.toLowerCase() == "object" && dom.type == "image/svg+xml") {
                return new Paper(dom.contentDocument.getElementsByTagName("svg")[0]);
            }
            return new Element(dom);
        }

        Snap._.make = make;
        Snap._.wrap = wrap;
        /*\
         * Paper.el
         [ method ]
         **
         * Creates an element on paper with a given name and no attributes
         **
         - name (string) tag name
         - attr (object) attributes
         = (Element) the current element
         > Usage
         | var c = paper.circle(10, 10, 10); // is the same as...
         | var c = paper.el("circle").attr({
         |     cx: 10,
         |     cy: 10,
         |     r: 10
         | });
         | // and the same as
         | var c = paper.el("circle", {
         |     cx: 10,
         |     cy: 10,
         |     r: 10
         | });
        \*/
        Paper.prototype.el = function (name, attr) {
            var el = make(name, this.node);
            attr && el.attr(attr);
            return el;
        };
        /*\
         * Element.children
         [ method ]
         **
         * Returns array of all the children of the element.
         = (array) array of Elements
        \*/
        Element.prototype.children = function () {
            var out = [],
                ch = this.node.childNodes;
            for (var i = 0, ii = ch.length; i < ii; i++) {
                out[i] = Snap(ch[i]);
            }
            return out;
        };
        function jsonFiller(root, o) {
            for (var i = 0, ii = root.length; i < ii; i++) {
                var item = {
                    type: root[i].type,
                    attr: root[i].attr()
                },
                    children = root[i].children();
                o.push(item);
                if (children.length) {
                    jsonFiller(children, item.childNodes = []);
                }
            }
        }
        /*\
         * Element.toJSON
         [ method ]
         **
         * Returns object representation of the given element and all its children.
         = (object) in format
         o {
         o     type (string) this.type,
         o     attr (object) attributes map,
         o     childNodes (array) optional array of children in the same format
         o }
        \*/
        Element.prototype.toJSON = function () {
            var out = [];
            jsonFiller([this], out);
            return out[0];
        };
        // default
        eve.on("snap.util.getattr", function () {
            var att = eve.nt();
            att = att.substring(att.lastIndexOf(".") + 1);
            var css = att.replace(/[A-Z]/g, function (letter) {
                return "-" + letter.toLowerCase();
            });
            if (cssAttr[has](css)) {
                return this.node.ownerDocument.defaultView.getComputedStyle(this.node, null).getPropertyValue(css);
            } else {
                return $(this.node, att);
            }
        });
        var cssAttr = {
            "alignment-baseline": 0,
            "baseline-shift": 0,
            "clip": 0,
            "clip-path": 0,
            "clip-rule": 0,
            "color": 0,
            "color-interpolation": 0,
            "color-interpolation-filters": 0,
            "color-profile": 0,
            "color-rendering": 0,
            "cursor": 0,
            "direction": 0,
            "display": 0,
            "dominant-baseline": 0,
            "enable-background": 0,
            "fill": 0,
            "fill-opacity": 0,
            "fill-rule": 0,
            "filter": 0,
            "flood-color": 0,
            "flood-opacity": 0,
            "font": 0,
            "font-family": 0,
            "font-size": 0,
            "font-size-adjust": 0,
            "font-stretch": 0,
            "font-style": 0,
            "font-variant": 0,
            "font-weight": 0,
            "glyph-orientation-horizontal": 0,
            "glyph-orientation-vertical": 0,
            "image-rendering": 0,
            "kerning": 0,
            "letter-spacing": 0,
            "lighting-color": 0,
            "marker": 0,
            "marker-end": 0,
            "marker-mid": 0,
            "marker-start": 0,
            "mask": 0,
            "opacity": 0,
            "overflow": 0,
            "pointer-events": 0,
            "shape-rendering": 0,
            "stop-color": 0,
            "stop-opacity": 0,
            "stroke": 0,
            "stroke-dasharray": 0,
            "stroke-dashoffset": 0,
            "stroke-linecap": 0,
            "stroke-linejoin": 0,
            "stroke-miterlimit": 0,
            "stroke-opacity": 0,
            "stroke-width": 0,
            "text-anchor": 0,
            "text-decoration": 0,
            "text-rendering": 0,
            "unicode-bidi": 0,
            "visibility": 0,
            "word-spacing": 0,
            "writing-mode": 0
        };

        eve.on("snap.util.attr", function (value) {
            var att = eve.nt(),
                attr = {};
            att = att.substring(att.lastIndexOf(".") + 1);
            attr[att] = value;
            var style = att.replace(/-(\w)/gi, function (all, letter) {
                return letter.toUpperCase();
            }),
                css = att.replace(/[A-Z]/g, function (letter) {
                    return "-" + letter.toLowerCase();
                });
            if (cssAttr[has](css)) {
                this.node.style[style] = value == null ? E : value;
            } else {
                $(this.node, attr);
            }
        });
        (function (proto) { }(Paper.prototype));

        // simple ajax
        /*\
         * Snap.ajax
         [ method ]
         **
         * Simple implementation of Ajax
         **
         - url (string) URL
         - postData (object|string) data for post request
         - callback (function) callback
         - scope (object) #optional scope of callback
         * or
         - url (string) URL
         - callback (function) callback
         - scope (object) #optional scope of callback
         = (XMLHttpRequest) the XMLHttpRequest object, just in case
        \*/
        Snap.ajax = function (url, postData, callback, scope) {
            var req = new XMLHttpRequest,
                id = ID();
            if (req) {
                if (is(postData, "function")) {
                    scope = callback;
                    callback = postData;
                    postData = null;
                } else if (is(postData, "object")) {
                    var pd = [];
                    for (var key in postData) if (postData.hasOwnProperty(key)) {
                        pd.push(encodeURIComponent(key) + "=" + encodeURIComponent(postData[key]));
                    }
                    postData = pd.join("&");
                }
                req.open(postData ? "POST" : "GET", url, true);
                if (postData) {
                    req.setRequestHeader("X-Requested-With", "XMLHttpRequest");
                    req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                }
                if (callback) {
                    eve.once("snap.ajax." + id + ".0", callback);
                    eve.once("snap.ajax." + id + ".200", callback);
                    eve.once("snap.ajax." + id + ".304", callback);
                }
                req.onreadystatechange = function () {
                    if (req.readyState != 4) return;
                    eve("snap.ajax." + id + "." + req.status, scope, req);
                };
                if (req.readyState == 4) {
                    return req;
                }
                req.send(postData);
                return req;
            }
        };
        /*\
         * Snap.load
         [ method ]
         **
         * Loads external SVG file as a @Fragment (see @Snap.ajax for more advanced AJAX)
         **
         - url (string) URL
         - callback (function) callback
         - scope (object) #optional scope of callback
        \*/
        Snap.load = function (url, callback, scope) {
            Snap.ajax(url, function (req) {
                var f = Snap.parse(req.responseText);
                scope ? callback.call(scope, f) : callback(f);
            });
        };
        var getOffset = function (elem) {
            var box = elem.getBoundingClientRect(),
                doc = elem.ownerDocument,
                body = doc.body,
                docElem = doc.documentElement,
                clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
                top = box.top + (g.win.pageYOffset || docElem.scrollTop || body.scrollTop) - clientTop,
                left = box.left + (g.win.pageXOffset || docElem.scrollLeft || body.scrollLeft) - clientLeft;
            return {
                y: top,
                x: left
            };
        };
        /*\
         * Snap.getElementByPoint
         [ method ]
         **
         * Returns you topmost element under given point.
         **
         = (object) Snap element object
         - x (number) x coordinate from the top left corner of the window
         - y (number) y coordinate from the top left corner of the window
         > Usage
         | Snap.getElementByPoint(mouseX, mouseY).attr({stroke: "#f00"});
        \*/
        Snap.getElementByPoint = function (x, y) {
            var paper = this,
                svg = paper.canvas,
                target = glob.doc.elementFromPoint(x, y);
            if (glob.win.opera && target.tagName == "svg") {
                var so = getOffset(target),
                    sr = target.createSVGRect();
                sr.x = x - so.x;
                sr.y = y - so.y;
                sr.width = sr.height = 1;
                var hits = target.getIntersectionList(sr, null);
                if (hits.length) {
                    target = hits[hits.length - 1];
                }
            }
            if (!target) {
                return null;
            }
            return wrap(target);
        };
        /*\
         * Snap.plugin
         [ method ]
         **
         * Let you write plugins. You pass in a function with five arguments, like this:
         | Snap.plugin(function (Snap, Element, Paper, global, Fragment) {
         |     Snap.newmethod = function () {};
         |     Element.prototype.newmethod = function () {};
         |     Paper.prototype.newmethod = function () {};
         | });
         * Inside the function you have access to all main objects (and their
         * prototypes). This allow you to extend anything you want.
         **
         - f (function) your plugin body
        \*/
        Snap.plugin = function (f) {
            f(Snap, Element, Paper, glob, Fragment);
        };
        glob.win.Snap = Snap;
        return Snap;
    }(window || this));

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var elproto = Element.prototype,
            is = Snap.is,
            Str = String,
            unit2px = Snap._unit2px,
            $ = Snap._.$,
            make = Snap._.make,
            getSomeDefs = Snap._.getSomeDefs,
            has = "hasOwnProperty",
            wrap = Snap._.wrap;
        /*\
         * Element.getBBox
         [ method ]
         **
         * Returns the bounding box descriptor for the given element
         **
         = (object) bounding box descriptor:
         o {
         o     cx: (number) x of the center,
         o     cy: (number) x of the center,
         o     h: (number) height,
         o     height: (number) height,
         o     path: (string) path command for the box,
         o     r0: (number) radius of a circle that fully encloses the box,
         o     r1: (number) radius of the smallest circle that can be enclosed,
         o     r2: (number) radius of the largest circle that can be enclosed,
         o     vb: (string) box as a viewbox command,
         o     w: (number) width,
         o     width: (number) width,
         o     x2: (number) x of the right side,
         o     x: (number) x of the left side,
         o     y2: (number) y of the bottom edge,
         o     y: (number) y of the top edge
         o }
        \*/
        elproto.getBBox = function (isWithoutTransform) {
            if (this.type == "tspan") {
                return Snap._.box(this.node.getClientRects().item(0));
            }
            if (!Snap.Matrix || !Snap.path) {
                return this.node.getBBox();
            }
            var el = this,
                m = new Snap.Matrix;
            if (el.removed) {
                return Snap._.box();
            }
            while (el.type == "use") {
                if (!isWithoutTransform) {
                    m = m.add(el.transform().localMatrix.translate(el.attr("x") || 0, el.attr("y") || 0));
                }
                if (el.original) {
                    el = el.original;
                } else {
                    var href = el.attr("xlink:href");
                    el = el.original = el.node.ownerDocument.getElementById(href.substring(href.indexOf("#") + 1));
                }
            }
            var _ = el._,
                pathfinder = Snap.path.get[el.type] || Snap.path.get.deflt;
            try {
                if (isWithoutTransform) {
                    _.bboxwt = pathfinder ? Snap.path.getBBox(el.realPath = pathfinder(el)) : Snap._.box(el.node.getBBox());
                    return Snap._.box(_.bboxwt);
                } else {
                    el.realPath = pathfinder(el);
                    el.matrix = el.transform().localMatrix;
                    _.bbox = Snap.path.getBBox(Snap.path.map(el.realPath, m.add(el.matrix)));
                    return Snap._.box(_.bbox);
                }
            } catch (e) {
                // Firefox doesn’t give you bbox of hidden element
                return Snap._.box();
            }
        };
        var propString = function () {
            return this.string;
        };
        function extractTransform(el, tstr) {
            if (tstr == null) {
                var doReturn = true;
                if (el.type == "linearGradient" || el.type == "radialGradient") {
                    tstr = el.node.getAttribute("gradientTransform");
                } else if (el.type == "pattern") {
                    tstr = el.node.getAttribute("patternTransform");
                } else {
                    tstr = el.node.getAttribute("transform");
                }
                if (!tstr) {
                    return new Snap.Matrix;
                }
                tstr = Snap._.svgTransform2string(tstr);
            } else {
                if (!Snap._.rgTransform.test(tstr)) {
                    tstr = Snap._.svgTransform2string(tstr);
                } else {
                    tstr = Str(tstr).replace(/\.{3}|\u2026/g, el._.transform || "");
                }
                if (is(tstr, "array")) {
                    tstr = Snap.path ? Snap.path.toString.call(tstr) : Str(tstr);
                }
                el._.transform = tstr;
            }
            var m = Snap._.transform2matrix(tstr, el.getBBox(1));
            if (doReturn) {
                return m;
            } else {
                el.matrix = m;
            }
        }
        /*\
         * Element.transform
         [ method ]
         **
         * Gets or sets transformation of the element
         **
         - tstr (string) transform string in Snap or SVG format
         = (Element) the current element
         * or
         = (object) transformation descriptor:
         o {
         o     string (string) transform string,
         o     globalMatrix (Matrix) matrix of all transformations applied to element or its parents,
         o     localMatrix (Matrix) matrix of transformations applied only to the element,
         o     diffMatrix (Matrix) matrix of difference between global and local transformations,
         o     global (string) global transformation as string,
         o     local (string) local transformation as string,
         o     toString (function) returns `string` property
         o }
        \*/
        elproto.transform = function (tstr) {
            var _ = this._;
            if (tstr == null) {
                var papa = this,
                    global = new Snap.Matrix(this.node.getCTM()),
                    local = extractTransform(this),
                    ms = [local],
                    m = new Snap.Matrix,
                    i,
                    localString = local.toTransformString(),
                    string = Str(local) == Str(this.matrix) ?
                        Str(_.transform) : localString;
                while (papa.type != "svg" && (papa = papa.parent())) {
                    ms.push(extractTransform(papa));
                }
                i = ms.length;
                while (i--) {
                    m.add(ms[i]);
                }
                return {
                    string: string,
                    globalMatrix: global,
                    totalMatrix: m,
                    localMatrix: local,
                    diffMatrix: global.clone().add(local.invert()),
                    global: global.toTransformString(),
                    total: m.toTransformString(),
                    local: localString,
                    toString: propString
                };
            }
            if (tstr instanceof Snap.Matrix) {
                this.matrix = tstr;
                this._.transform = tstr.toTransformString();
            } else {
                extractTransform(this, tstr);
            }

            if (this.node) {
                if (this.type == "linearGradient" || this.type == "radialGradient") {
                    $(this.node, { gradientTransform: this.matrix });
                } else if (this.type == "pattern") {
                    $(this.node, { patternTransform: this.matrix });
                } else {
                    $(this.node, { transform: this.matrix });
                }
            }

            return this;
        };
        /*\
         * Element.parent
         [ method ]
         **
         * Returns the element's parent
         **
         = (Element) the parent element
        \*/
        elproto.parent = function () {
            return wrap(this.node.parentNode);
        };
        /*\
         * Element.append
         [ method ]
         **
         * Appends the given element to current one
         **
         - el (Element|Set) element to append
         = (Element) the parent element
        \*/
        /*\
         * Element.add
         [ method ]
         **
         * See @Element.append
        \*/
        elproto.append = elproto.add = function (el) {
            if (el) {
                if (el.type == "set") {
                    var it = this;
                    el.forEach(function (el) {
                        it.add(el);
                    });
                    return this;
                }
                el = wrap(el);
                this.node.appendChild(el.node);
                el.paper = this.paper;
            }
            return this;
        };
        /*\
         * Element.appendTo
         [ method ]
         **
         * Appends the current element to the given one
         **
         - el (Element) parent element to append to
         = (Element) the child element
        \*/
        elproto.appendTo = function (el) {
            if (el) {
                el = wrap(el);
                el.append(this);
            }
            return this;
        };
        /*\
         * Element.prepend
         [ method ]
         **
         * Prepends the given element to the current one
         **
         - el (Element) element to prepend
         = (Element) the parent element
        \*/
        elproto.prepend = function (el) {
            if (el) {
                if (el.type == "set") {
                    var it = this,
                        first;
                    el.forEach(function (el) {
                        if (first) {
                            first.after(el);
                        } else {
                            it.prepend(el);
                        }
                        first = el;
                    });
                    return this;
                }
                el = wrap(el);
                var parent = el.parent();
                this.node.insertBefore(el.node, this.node.firstChild);
                this.add && this.add();
                el.paper = this.paper;
                this.parent() && this.parent().add();
                parent && parent.add();
            }
            return this;
        };
        /*\
         * Element.prependTo
         [ method ]
         **
         * Prepends the current element to the given one
         **
         - el (Element) parent element to prepend to
         = (Element) the child element
        \*/
        elproto.prependTo = function (el) {
            el = wrap(el);
            el.prepend(this);
            return this;
        };
        /*\
         * Element.before
         [ method ]
         **
         * Inserts given element before the current one
         **
         - el (Element) element to insert
         = (Element) the parent element
        \*/
        elproto.before = function (el) {
            if (el.type == "set") {
                var it = this;
                el.forEach(function (el) {
                    var parent = el.parent();
                    it.node.parentNode.insertBefore(el.node, it.node);
                    parent && parent.add();
                });
                this.parent().add();
                return this;
            }
            el = wrap(el);
            var parent = el.parent();
            this.node.parentNode.insertBefore(el.node, this.node);
            this.parent() && this.parent().add();
            parent && parent.add();
            el.paper = this.paper;
            return this;
        };
        /*\
         * Element.after
         [ method ]
         **
         * Inserts given element after the current one
         **
         - el (Element) element to insert
         = (Element) the parent element
        \*/
        elproto.after = function (el) {
            el = wrap(el);
            var parent = el.parent();
            if (this.node.nextSibling) {
                this.node.parentNode.insertBefore(el.node, this.node.nextSibling);
            } else {
                this.node.parentNode.appendChild(el.node);
            }
            this.parent() && this.parent().add();
            parent && parent.add();
            el.paper = this.paper;
            return this;
        };
        /*\
         * Element.insertBefore
         [ method ]
         **
         * Inserts the element after the given one
         **
         - el (Element) element next to whom insert to
         = (Element) the parent element
        \*/
        elproto.insertBefore = function (el) {
            el = wrap(el);
            var parent = this.parent();
            el.node.parentNode.insertBefore(this.node, el.node);
            this.paper = el.paper;
            parent && parent.add();
            el.parent() && el.parent().add();
            return this;
        };
        /*\
         * Element.insertAfter
         [ method ]
         **
         * Inserts the element after the given one
         **
         - el (Element) element next to whom insert to
         = (Element) the parent element
        \*/
        elproto.insertAfter = function (el) {
            el = wrap(el);
            var parent = this.parent();
            el.node.parentNode.insertBefore(this.node, el.node.nextSibling);
            this.paper = el.paper;
            parent && parent.add();
            el.parent() && el.parent().add();
            return this;
        };
        /*\
         * Element.remove
         [ method ]
         **
         * Removes element from the DOM
         = (Element) the detached element
        \*/
        elproto.remove = function () {
            var parent = this.parent();
            this.node.parentNode && this.node.parentNode.removeChild(this.node);
            delete this.paper;
            this.removed = true;
            parent && parent.add();
            return this;
        };
        /*\
         * Element.select
         [ method ]
         **
         * Gathers the nested @Element matching the given set of CSS selectors
         **
         - query (string) CSS selector
         = (Element) result of query selection
        \*/
        elproto.select = function (query) {
            return wrap(this.node.querySelector(query));
        };
        /*\
         * Element.selectAll
         [ method ]
         **
         * Gathers nested @Element objects matching the given set of CSS selectors
         **
         - query (string) CSS selector
         = (Set|array) result of query selection
        \*/
        elproto.selectAll = function (query) {
            var nodelist = this.node.querySelectorAll(query),
                set = (Snap.set || Array)();
            for (var i = 0; i < nodelist.length; i++) {
                set.push(wrap(nodelist[i]));
            }
            return set;
        };
        /*\
         * Element.asPX
         [ method ]
         **
         * Returns given attribute of the element as a `px` value (not %, em, etc.)
         **
         - attr (string) attribute name
         - value (string) #optional attribute value
         = (Element) result of query selection
        \*/
        elproto.asPX = function (attr, value) {
            if (value == null) {
                value = this.attr(attr);
            }
            return +unit2px(this, attr, value);
        };
        // SIERRA Element.use(): I suggest adding a note about how to access the original element the returned <use> instantiates. It's a part of SVG with which ordinary web developers may be least familiar.
        /*\
         * Element.use
         [ method ]
         **
         * Creates a `<use>` element linked to the current element
         **
         = (Element) the `<use>` element
        \*/
        elproto.use = function () {
            var use,
                id = this.node.id;
            if (!id) {
                id = this.id;
                $(this.node, {
                    id: id
                });
            }
            if (this.type == "linearGradient" || this.type == "radialGradient" ||
                this.type == "pattern") {
                use = make(this.type, this.node.parentNode);
            } else {
                use = make("use", this.node.parentNode);
            }
            $(use.node, {
                "xlink:href": "#" + id
            });
            use.original = this;
            return use;
        };
        function fixids(el) {
            var els = el.selectAll("*"),
                it,
                url = /^\s*url\(("|'|)(.*)\1\)\s*$/,
                ids = [],
                uses = {};
            function urltest(it, name) {
                var val = $(it.node, name);
                val = val && val.match(url);
                val = val && val[2];
                if (val && val.charAt() == "#") {
                    val = val.substring(1);
                } else {
                    return;
                }
                if (val) {
                    uses[val] = (uses[val] || []).concat(function (id) {
                        var attr = {};
                        attr[name] = Snap.url(id);
                        $(it.node, attr);
                    });
                }
            }
            function linktest(it) {
                var val = $(it.node, "xlink:href");
                if (val && val.charAt() == "#") {
                    val = val.substring(1);
                } else {
                    return;
                }
                if (val) {
                    uses[val] = (uses[val] || []).concat(function (id) {
                        it.attr("xlink:href", "#" + id);
                    });
                }
            }
            for (var i = 0, ii = els.length; i < ii; i++) {
                it = els[i];
                urltest(it, "fill");
                urltest(it, "stroke");
                urltest(it, "filter");
                urltest(it, "mask");
                urltest(it, "clip-path");
                linktest(it);
                var oldid = $(it.node, "id");
                if (oldid) {
                    $(it.node, { id: it.id });
                    ids.push({
                        old: oldid,
                        id: it.id
                    });
                }
            }
            for (i = 0, ii = ids.length; i < ii; i++) {
                var fs = uses[ids[i].old];
                if (fs) {
                    for (var j = 0, jj = fs.length; j < jj; j++) {
                        fs[j](ids[i].id);
                    }
                }
            }
        }
        /*\
         * Element.clone
         [ method ]
         **
         * Creates a clone of the element and inserts it after the element
         **
         = (Element) the clone
        \*/
        elproto.clone = function () {
            var clone = wrap(this.node.cloneNode(true));
            if ($(clone.node, "id")) {
                $(clone.node, { id: clone.id });
            }
            fixids(clone);
            clone.insertAfter(this);
            return clone;
        };
        /*\
         * Element.toDefs
         [ method ]
         **
         * Moves element to the shared `<defs>` area
         **
         = (Element) the element
        \*/
        elproto.toDefs = function () {
            var defs = getSomeDefs(this);
            defs.appendChild(this.node);
            return this;
        };
        /*\
         * Element.toPattern
         [ method ]
         **
         * Creates a `<pattern>` element from the current element
         **
         * To create a pattern you have to specify the pattern rect:
         - x (string|number)
         - y (string|number)
         - width (string|number)
         - height (string|number)
         = (Element) the `<pattern>` element
         * You can use pattern later on as an argument for `fill` attribute:
         | var p = paper.path("M10-5-10,15M15,0,0,15M0-5-20,15").attr({
         |         fill: "none",
         |         stroke: "#bada55",
         |         strokeWidth: 5
         |     }).pattern(0, 0, 10, 10),
         |     c = paper.circle(200, 200, 100);
         | c.attr({
         |     fill: p
         | });
        \*/
        elproto.pattern = elproto.toPattern = function (x, y, width, height) {
            var p = make("pattern", getSomeDefs(this));
            if (x == null) {
                x = this.getBBox();
            }
            if (is(x, "object") && "x" in x) {
                y = x.y;
                width = x.width;
                height = x.height;
                x = x.x;
            }
            $(p.node, {
                x: x,
                y: y,
                width: width,
                height: height,
                patternUnits: "userSpaceOnUse",
                id: p.id,
                viewBox: [x, y, width, height].join(" ")
            });
            p.node.appendChild(this.node);
            return p;
        };
        // SIERRA Element.marker(): clarify what a reference point is. E.g., helps you offset the object from its edge such as when centering it over a path.
        // SIERRA Element.marker(): I suggest the method should accept default reference point values.  Perhaps centered with (refX = width/2) and (refY = height/2)? Also, couldn't it assume the element's current _width_ and _height_? And please specify what _x_ and _y_ mean: offsets? If so, from where?  Couldn't they also be assigned default values?
        /*\
         * Element.marker
         [ method ]
         **
         * Creates a `<marker>` element from the current element
         **
         * To create a marker you have to specify the bounding rect and reference point:
         - x (number)
         - y (number)
         - width (number)
         - height (number)
         - refX (number)
         - refY (number)
         = (Element) the `<marker>` element
         * You can specify the marker later as an argument for `marker-start`, `marker-end`, `marker-mid`, and `marker` attributes. The `marker` attribute places the marker at every point along the path, and `marker-mid` places them at every point except the start and end.
        \*/
        // TODO add usage for markers
        elproto.marker = function (x, y, width, height, refX, refY) {
            var p = make("marker", getSomeDefs(this));
            if (x == null) {
                x = this.getBBox();
            }
            if (is(x, "object") && "x" in x) {
                y = x.y;
                width = x.width;
                height = x.height;
                refX = x.refX || x.cx;
                refY = x.refY || x.cy;
                x = x.x;
            }
            $(p.node, {
                viewBox: [x, y, width, height].join(" "),
                markerWidth: width,
                markerHeight: height,
                orient: "auto",
                refX: refX || 0,
                refY: refY || 0,
                id: p.id
            });
            p.node.appendChild(this.node);
            return p;
        };
        var eldata = {};
        /*\
         * Element.data
         [ method ]
         **
         * Adds or retrieves given value associated with given key. (Don’t confuse
         * with `data-` attributes)
         *
         * See also @Element.removeData
         - key (string) key to store data
         - value (any) #optional value to store
         = (object) @Element
         * or, if value is not specified:
         = (any) value
         > Usage
         | for (var i = 0, i < 5, i++) {
         |     paper.circle(10 + 15 * i, 10, 10)
         |          .attr({fill: "#000"})
         |          .data("i", i)
         |          .click(function () {
         |             alert(this.data("i"));
         |          });
         | }
        \*/
        elproto.data = function (key, value) {
            var data = eldata[this.id] = eldata[this.id] || {};
            if (arguments.length == 0) {
                eve("snap.data.get." + this.id, this, data, null);
                return data;
            }
            if (arguments.length == 1) {
                if (Snap.is(key, "object")) {
                    for (var i in key) if (key[has](i)) {
                        this.data(i, key[i]);
                    }
                    return this;
                }
                eve("snap.data.get." + this.id, this, data[key], key);
                return data[key];
            }
            data[key] = value;
            eve("snap.data.set." + this.id, this, value, key);
            return this;
        };
        /*\
         * Element.removeData
         [ method ]
         **
         * Removes value associated with an element by given key.
         * If key is not provided, removes all the data of the element.
         - key (string) #optional key
         = (object) @Element
        \*/
        elproto.removeData = function (key) {
            if (key == null) {
                eldata[this.id] = {};
            } else {
                eldata[this.id] && delete eldata[this.id][key];
            }
            return this;
        };
        /*\
         * Element.outerSVG
         [ method ]
         **
         * Returns SVG code for the element, equivalent to HTML's `outerHTML`.
         *
         * See also @Element.innerSVG
         = (string) SVG code for the element
        \*/
        /*\
         * Element.toString
         [ method ]
         **
         * See @Element.outerSVG
        \*/
        elproto.outerSVG = elproto.toString = toString(1);
        /*\
         * Element.innerSVG
         [ method ]
         **
         * Returns SVG code for the element's contents, equivalent to HTML's `innerHTML`
         = (string) SVG code for the element
        \*/
        elproto.innerSVG = toString();
        function toString(type) {
            return function () {
                var res = type ? "<" + this.type : "",
                    attr = this.node.attributes,
                    chld = this.node.childNodes;
                if (type) {
                    for (var i = 0, ii = attr.length; i < ii; i++) {
                        res += " " + attr[i].name + '="' +
                            attr[i].value.replace(/"/g, '\\"') + '"';
                    }
                }
                if (chld.length) {
                    type && (res += ">");
                    for (i = 0, ii = chld.length; i < ii; i++) {
                        if (chld[i].nodeType == 3) {
                            res += chld[i].nodeValue;
                        } else if (chld[i].nodeType == 1) {
                            res += wrap(chld[i]).toString();
                        }
                    }
                    type && (res += "</" + this.type + ">");
                } else {
                    type && (res += "/>");
                }
                return res;
            };
        }
        elproto.toDataURL = function () {
            if (window && window.btoa) {
                var bb = this.getBBox(),
                    svg = Snap.format('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="{width}" height="{height}" viewBox="{x} {y} {width} {height}">{contents}</svg>', {
                        x: +bb.x.toFixed(3),
                        y: +bb.y.toFixed(3),
                        width: +bb.width.toFixed(3),
                        height: +bb.height.toFixed(3),
                        contents: this.outerSVG()
                    });
                return "data:image/svg+xml;base64," + btoa(unescape(encodeURIComponent(svg)));
            }
        };
        /*\
         * Fragment.select
         [ method ]
         **
         * See @Element.select
        \*/
        Fragment.prototype.select = elproto.select;
        /*\
         * Fragment.selectAll
         [ method ]
         **
         * See @Element.selectAll
        \*/
        Fragment.prototype.selectAll = elproto.selectAll;
    });

    // Copyright (c) 2016 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var elproto = Element.prototype,
            is = Snap.is,
            Str = String,
            has = "hasOwnProperty";
        function slice(from, to, f) {
            return function (arr) {
                var res = arr.slice(from, to);
                if (res.length == 1) {
                    res = res[0];
                }
                return f ? f(res) : res;
            };
        }
        var Animation = function (attr, ms, easing, callback) {
            if (typeof easing == "function" && !easing.length) {
                callback = easing;
                easing = mina.linear;
            }
            this.attr = attr;
            this.dur = ms;
            easing && (this.easing = easing);
            callback && (this.callback = callback);
        };
        Snap._.Animation = Animation;
        /*\
         * Snap.animation
         [ method ]
         **
         * Creates an animation object
         **
         - attr (object) attributes of final destination
         - duration (number) duration of the animation, in milliseconds
         - easing (function) #optional one of easing functions of @mina or custom one
         - callback (function) #optional callback function that fires when animation ends
         = (object) animation object
        \*/
        Snap.animation = function (attr, ms, easing, callback) {
            return new Animation(attr, ms, easing, callback);
        };
        /*\
         * Element.inAnim
         [ method ]
         **
         * Returns a set of animations that may be able to manipulate the current element
         **
         = (object) in format:
         o {
         o     anim (object) animation object,
         o     mina (object) @mina object,
         o     curStatus (number) 0..1 — status of the animation: 0 — just started, 1 — just finished,
         o     status (function) gets or sets the status of the animation,
         o     stop (function) stops the animation
         o }
        \*/
        elproto.inAnim = function () {
            var el = this,
                res = [];
            for (var id in el.anims) if (el.anims[has](id)) {
                (function (a) {
                    res.push({
                        anim: new Animation(a._attrs, a.dur, a.easing, a._callback),
                        mina: a,
                        curStatus: a.status(),
                        status: function (val) {
                            return a.status(val);
                        },
                        stop: function () {
                            a.stop();
                        }
                    });
                }(el.anims[id]));
            }
            return res;
        };
        /*\
         * Snap.animate
         [ method ]
         **
         * Runs generic animation of one number into another with a caring function
         **
         - from (number|array) number or array of numbers
         - to (number|array) number or array of numbers
         - setter (function) caring function that accepts one number argument
         - duration (number) duration, in milliseconds
         - easing (function) #optional easing function from @mina or custom
         - callback (function) #optional callback function to execute when animation ends
         = (object) animation object in @mina format
         o {
         o     id (string) animation id, consider it read-only,
         o     duration (function) gets or sets the duration of the animation,
         o     easing (function) easing,
         o     speed (function) gets or sets the speed of the animation,
         o     status (function) gets or sets the status of the animation,
         o     stop (function) stops the animation
         o }
         | var rect = Snap().rect(0, 0, 10, 10);
         | Snap.animate(0, 10, function (val) {
         |     rect.attr({
         |         x: val
         |     });
         | }, 1000);
         | // in given context is equivalent to
         | rect.animate({x: 10}, 1000);
        \*/
        Snap.animate = function (from, to, setter, ms, easing, callback) {
            if (typeof easing == "function" && !easing.length) {
                callback = easing;
                easing = mina.linear;
            }
            var now = mina.time(),
                anim = mina(from, to, now, now + ms, mina.time, setter, easing);
            callback && eve.once("mina.finish." + anim.id, callback);
            return anim;
        };
        /*\
         * Element.stop
         [ method ]
         **
         * Stops all the animations for the current element
         **
         = (Element) the current element
        \*/
        elproto.stop = function () {
            var anims = this.inAnim();
            for (var i = 0, ii = anims.length; i < ii; i++) {
                anims[i].stop();
            }
            return this;
        };
        /*\
         * Element.animate
         [ method ]
         **
         * Animates the given attributes of the element
         **
         - attrs (object) key-value pairs of destination attributes
         - duration (number) duration of the animation in milliseconds
         - easing (function) #optional easing function from @mina or custom
         - callback (function) #optional callback function that executes when the animation ends
         = (Element) the current element
        \*/
        elproto.animate = function (attrs, ms, easing, callback) {
            if (typeof easing == "function" && !easing.length) {
                callback = easing;
                easing = mina.linear;
            }
            if (attrs instanceof Animation) {
                callback = attrs.callback;
                easing = attrs.easing;
                ms = attrs.dur;
                attrs = attrs.attr;
            }
            var fkeys = [], tkeys = [], keys = {}, from, to, f, eq,
                el = this;
            for (var key in attrs) if (attrs[has](key)) {
                if (el.equal) {
                    eq = el.equal(key, Str(attrs[key]));
                    from = eq.from;
                    to = eq.to;
                    f = eq.f;
                } else {
                    from = +el.attr(key);
                    to = +attrs[key];
                }
                var len = is(from, "array") ? from.length : 1;
                keys[key] = slice(fkeys.length, fkeys.length + len, f);
                fkeys = fkeys.concat(from);
                tkeys = tkeys.concat(to);
            }
            var now = mina.time(),
                anim = mina(fkeys, tkeys, now, now + ms, mina.time, function (val) {
                    var attr = {};
                    for (var key in keys) if (keys[has](key)) {
                        attr[key] = keys[key](val);
                    }
                    el.attr(attr);
                }, easing);
            el.anims[anim.id] = anim;
            anim._attrs = attrs;
            anim._callback = callback;
            eve("snap.animcreated." + el.id, anim);
            eve.once("mina.finish." + anim.id, function () {
                eve.off("mina.*." + anim.id);
                delete el.anims[anim.id];
                callback && callback.call(el);
            });
            eve.once("mina.stop." + anim.id, function () {
                eve.off("mina.*." + anim.id);
                delete el.anims[anim.id];
            });
            return el;
        };
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var objectToString = Object.prototype.toString,
            Str = String,
            math = Math,
            E = "";
        function Matrix(a, b, c, d, e, f) {
            if (b == null && objectToString.call(a) == "[object SVGMatrix]") {
                this.a = a.a;
                this.b = a.b;
                this.c = a.c;
                this.d = a.d;
                this.e = a.e;
                this.f = a.f;
                return;
            }
            if (a != null) {
                this.a = +a;
                this.b = +b;
                this.c = +c;
                this.d = +d;
                this.e = +e;
                this.f = +f;
            } else {
                this.a = 1;
                this.b = 0;
                this.c = 0;
                this.d = 1;
                this.e = 0;
                this.f = 0;
            }
        }
        (function (matrixproto) {
            /*\
             * Matrix.add
             [ method ]
             **
             * Adds the given matrix to existing one
             - a (number)
             - b (number)
             - c (number)
             - d (number)
             - e (number)
             - f (number)
             * or
             - matrix (object) @Matrix
            \*/
            matrixproto.add = function (a, b, c, d, e, f) {
                if (a && a instanceof Matrix) {
                    return this.add(a.a, a.b, a.c, a.d, a.e, a.f);
                }
                var aNew = a * this.a + b * this.c,
                    bNew = a * this.b + b * this.d;
                this.e += e * this.a + f * this.c;
                this.f += e * this.b + f * this.d;
                this.c = c * this.a + d * this.c;
                this.d = c * this.b + d * this.d;

                this.a = aNew;
                this.b = bNew;
                return this;
            };
            /*\
             * Matrix.multLeft
             [ method ]
             **
             * Multiplies a passed affine transform to the left: M * this.
             - a (number)
             - b (number)
             - c (number)
             - d (number)
             - e (number)
             - f (number)
             * or
             - matrix (object) @Matrix
            \*/
            Matrix.prototype.multLeft = function (a, b, c, d, e, f) {
                if (a && a instanceof Matrix) {
                    return this.multLeft(a.a, a.b, a.c, a.d, a.e, a.f);
                }
                var aNew = a * this.a + c * this.b,
                    cNew = a * this.c + c * this.d,
                    eNew = a * this.e + c * this.f + e;
                this.b = b * this.a + d * this.b;
                this.d = b * this.c + d * this.d;
                this.f = b * this.e + d * this.f + f;

                this.a = aNew;
                this.c = cNew;
                this.e = eNew;
                return this;
            };
            /*\
             * Matrix.invert
             [ method ]
             **
             * Returns an inverted version of the matrix
             = (object) @Matrix
            \*/
            matrixproto.invert = function () {
                var me = this,
                    x = me.a * me.d - me.b * me.c;
                return new Matrix(me.d / x, -me.b / x, -me.c / x, me.a / x, (me.c * me.f - me.d * me.e) / x, (me.b * me.e - me.a * me.f) / x);
            };
            /*\
             * Matrix.clone
             [ method ]
             **
             * Returns a copy of the matrix
             = (object) @Matrix
            \*/
            matrixproto.clone = function () {
                return new Matrix(this.a, this.b, this.c, this.d, this.e, this.f);
            };
            /*\
             * Matrix.translate
             [ method ]
             **
             * Translate the matrix
             - x (number) horizontal offset distance
             - y (number) vertical offset distance
            \*/
            matrixproto.translate = function (x, y) {
                this.e += x * this.a + y * this.c;
                this.f += x * this.b + y * this.d;
                return this;
            };
            /*\
             * Matrix.scale
             [ method ]
             **
             * Scales the matrix
             - x (number) amount to be scaled, with `1` resulting in no change
             - y (number) #optional amount to scale along the vertical axis. (Otherwise `x` applies to both axes.)
             - cx (number) #optional horizontal origin point from which to scale
             - cy (number) #optional vertical origin point from which to scale
             * Default cx, cy is the middle point of the element.
            \*/
            matrixproto.scale = function (x, y, cx, cy) {
                y == null && (y = x);
                (cx || cy) && this.translate(cx, cy);
                this.a *= x;
                this.b *= x;
                this.c *= y;
                this.d *= y;
                (cx || cy) && this.translate(-cx, -cy);
                return this;
            };
            /*\
             * Matrix.rotate
             [ method ]
             **
             * Rotates the matrix
             - a (number) angle of rotation, in degrees
             - x (number) horizontal origin point from which to rotate
             - y (number) vertical origin point from which to rotate
            \*/
            matrixproto.rotate = function (a, x, y) {
                a = Snap.rad(a);
                x = x || 0;
                y = y || 0;
                var cos = +math.cos(a).toFixed(9),
                    sin = +math.sin(a).toFixed(9);
                this.add(cos, sin, -sin, cos, x, y);
                return this.add(1, 0, 0, 1, -x, -y);
            };
            /*\
             * Matrix.skewX
             [ method ]
             **
             * Skews the matrix along the x-axis
             - x (number) Angle to skew along the x-axis (in degrees).
            \*/
            matrixproto.skewX = function (x) {
                return this.skew(x, 0);
            };
            /*\
             * Matrix.skewY
             [ method ]
             **
             * Skews the matrix along the y-axis
             - y (number) Angle to skew along the y-axis (in degrees).
            \*/
            matrixproto.skewY = function (y) {
                return this.skew(0, y);
            };
            /*\
             * Matrix.skew
             [ method ]
             **
             * Skews the matrix
             - y (number) Angle to skew along the y-axis (in degrees).
             - x (number) Angle to skew along the x-axis (in degrees).
            \*/
            matrixproto.skew = function (x, y) {
                x = x || 0;
                y = y || 0;
                x = Snap.rad(x);
                y = Snap.rad(y);
                var c = math.tan(x).toFixed(9);
                var b = math.tan(y).toFixed(9);
                return this.add(1, b, c, 1, 0, 0);
            };
            /*\
             * Matrix.x
             [ method ]
             **
             * Returns x coordinate for given point after transformation described by the matrix. See also @Matrix.y
             - x (number)
             - y (number)
             = (number) x
            \*/
            matrixproto.x = function (x, y) {
                return x * this.a + y * this.c + this.e;
            };
            /*\
             * Matrix.y
             [ method ]
             **
             * Returns y coordinate for given point after transformation described by the matrix. See also @Matrix.x
             - x (number)
             - y (number)
             = (number) y
            \*/
            matrixproto.y = function (x, y) {
                return x * this.b + y * this.d + this.f;
            };
            matrixproto.get = function (i) {
                return +this[Str.fromCharCode(97 + i)].toFixed(4);
            };
            matrixproto.toString = function () {
                return "matrix(" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)].join() + ")";
            };
            matrixproto.offset = function () {
                return [this.e.toFixed(4), this.f.toFixed(4)];
            };
            function norm(a) {
                return a[0] * a[0] + a[1] * a[1];
            }
            function normalize(a) {
                var mag = math.sqrt(norm(a));
                a[0] && (a[0] /= mag);
                a[1] && (a[1] /= mag);
            }
            /*\
             * Matrix.determinant
             [ method ]
             **
             * Finds determinant of the given matrix.
             = (number) determinant
            \*/
            matrixproto.determinant = function () {
                return this.a * this.d - this.b * this.c;
            };
            /*\
             * Matrix.split
             [ method ]
             **
             * Splits matrix into primitive transformations
             = (object) in format:
             o dx (number) translation by x
             o dy (number) translation by y
             o scalex (number) scale by x
             o scaley (number) scale by y
             o shear (number) shear
             o rotate (number) rotation in deg
             o isSimple (boolean) could it be represented via simple transformations
            \*/
            matrixproto.split = function () {
                var out = {};
                // translation
                out.dx = this.e;
                out.dy = this.f;

                // scale and shear
                var row = [[this.a, this.b], [this.c, this.d]];
                out.scalex = math.sqrt(norm(row[0]));
                normalize(row[0]);

                out.shear = row[0][0] * row[1][0] + row[0][1] * row[1][1];
                row[1] = [row[1][0] - row[0][0] * out.shear, row[1][1] - row[0][1] * out.shear];

                out.scaley = math.sqrt(norm(row[1]));
                normalize(row[1]);
                out.shear /= out.scaley;

                if (this.determinant() < 0) {
                    out.scalex = -out.scalex;
                }

                // rotation
                var sin = row[0][1],
                    cos = row[1][1];
                if (cos < 0) {
                    out.rotate = Snap.deg(math.acos(cos));
                    if (sin < 0) {
                        out.rotate = 360 - out.rotate;
                    }
                } else {
                    out.rotate = Snap.deg(math.asin(sin));
                }

                out.isSimple = !+out.shear.toFixed(9) && (out.scalex.toFixed(9) == out.scaley.toFixed(9) || !out.rotate);
                out.isSuperSimple = !+out.shear.toFixed(9) && out.scalex.toFixed(9) == out.scaley.toFixed(9) && !out.rotate;
                out.noRotation = !+out.shear.toFixed(9) && !out.rotate;
                return out;
            };
            /*\
             * Matrix.toTransformString
             [ method ]
             **
             * Returns transform string that represents given matrix
             = (string) transform string
            \*/
            matrixproto.toTransformString = function (shorter) {
                var s = shorter || this.split();
                if (!+s.shear.toFixed(9)) {
                    s.scalex = +s.scalex.toFixed(4);
                    s.scaley = +s.scaley.toFixed(4);
                    s.rotate = +s.rotate.toFixed(4);
                    return (s.dx || s.dy ? "t" + [+s.dx.toFixed(4), +s.dy.toFixed(4)] : E) +
                        (s.rotate ? "r" + [+s.rotate.toFixed(4), 0, 0] : E) +
                        (s.scalex != 1 || s.scaley != 1 ? "s" + [s.scalex, s.scaley, 0, 0] : E);
                } else {
                    return "m" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)];
                }
            };
        })(Matrix.prototype);
        /*\
         * Snap.Matrix
         [ method ]
         **
         * Matrix constructor, extend on your own risk.
         * To create matrices use @Snap.matrix.
        \*/
        Snap.Matrix = Matrix;
        /*\
         * Snap.matrix
         [ method ]
         **
         * Utility method
         **
         * Returns a matrix based on the given parameters
         - a (number)
         - b (number)
         - c (number)
         - d (number)
         - e (number)
         - f (number)
         * or
         - svgMatrix (SVGMatrix)
         = (object) @Matrix
        \*/
        Snap.matrix = function (a, b, c, d, e, f) {
            return new Matrix(a, b, c, d, e, f);
        };
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var has = "hasOwnProperty",
            make = Snap._.make,
            wrap = Snap._.wrap,
            is = Snap.is,
            getSomeDefs = Snap._.getSomeDefs,
            reURLValue = /^url\((['"]?)([^)]+)\1\)$/,
            $ = Snap._.$,
            URL = Snap.url,
            Str = String,
            separator = Snap._.separator,
            E = "";
        /*\
         * Snap.deurl
         [ method ]
         **
         * Unwraps path from `"url(<path>)"`.
         - value (string) url path
         = (string) unwrapped path
        \*/
        Snap.deurl = function (value) {
            var res = String(value).match(reURLValue);
            return res ? res[2] : value;
        }
        // Attributes event handlers
        eve.on("snap.util.attr.mask", function (value) {
            if (value instanceof Element || value instanceof Fragment) {
                eve.stop();
                if (value instanceof Fragment && value.node.childNodes.length == 1) {
                    value = value.node.firstChild;
                    getSomeDefs(this).appendChild(value);
                    value = wrap(value);
                }
                if (value.type == "mask") {
                    var mask = value;
                } else {
                    mask = make("mask", getSomeDefs(this));
                    mask.node.appendChild(value.node);
                }
                !mask.node.id && $(mask.node, {
                    id: mask.id
                });
                $(this.node, {
                    mask: URL(mask.id)
                });
            }
        });
        (function (clipIt) {
            eve.on("snap.util.attr.clip", clipIt);
            eve.on("snap.util.attr.clip-path", clipIt);
            eve.on("snap.util.attr.clipPath", clipIt);
        }(function (value) {
            if (value instanceof Element || value instanceof Fragment) {
                eve.stop();
                var clip,
                    node = value.node;
                while (node) {
                    if (node.nodeName === "clipPath") {
                        clip = new Element(node);
                        break;
                    }
                    if (node.nodeName === "svg") {
                        clip = undefined;
                        break;
                    }
                    node = node.parentNode;
                }
                if (!clip) {
                    clip = make("clipPath", getSomeDefs(this));
                    clip.node.appendChild(value.node);
                    !clip.node.id && $(clip.node, {
                        id: clip.id
                    });
                }
                $(this.node, {
                    "clip-path": URL(clip.node.id || clip.id)
                });
            }
        }));
        function fillStroke(name) {
            return function (value) {
                eve.stop();
                if (value instanceof Fragment && value.node.childNodes.length == 1 &&
                    (value.node.firstChild.tagName == "radialGradient" ||
                        value.node.firstChild.tagName == "linearGradient" ||
                        value.node.firstChild.tagName == "pattern")) {
                    value = value.node.firstChild;
                    getSomeDefs(this).appendChild(value);
                    value = wrap(value);
                }
                if (value instanceof Element) {
                    if (value.type == "radialGradient" || value.type == "linearGradient"
                        || value.type == "pattern") {
                        if (!value.node.id) {
                            $(value.node, {
                                id: value.id
                            });
                        }
                        var fill = URL(value.node.id);
                    } else {
                        fill = value.attr(name);
                    }
                } else {
                    fill = Snap.color(value);
                    if (fill.error) {
                        var grad = Snap(getSomeDefs(this).ownerSVGElement).gradient(value);
                        if (grad) {
                            if (!grad.node.id) {
                                $(grad.node, {
                                    id: grad.id
                                });
                            }
                            fill = URL(grad.node.id);
                        } else {
                            fill = value;
                        }
                    } else {
                        fill = Str(fill);
                    }
                }
                var attrs = {};
                attrs[name] = fill;
                $(this.node, attrs);
                this.node.style[name] = E;
            };
        }
        eve.on("snap.util.attr.fill", fillStroke("fill"));
        eve.on("snap.util.attr.stroke", fillStroke("stroke"));
        var gradrg = /^([lr])(?:\(([^)]*)\))?(.*)$/i;
        eve.on("snap.util.grad.parse", function parseGrad(string) {
            string = Str(string);
            var tokens = string.match(gradrg);
            if (!tokens) {
                return null;
            }
            var type = tokens[1],
                params = tokens[2],
                stops = tokens[3];
            params = params.split(/\s*,\s*/).map(function (el) {
                return +el == el ? +el : el;
            });
            if (params.length == 1 && params[0] == 0) {
                params = [];
            }
            stops = stops.split("-");
            stops = stops.map(function (el) {
                el = el.split(":");
                var out = {
                    color: el[0]
                };
                if (el[1]) {
                    out.offset = parseFloat(el[1]);
                }
                return out;
            });
            var len = stops.length,
                start = 0,
                j = 0;
            function seed(i, end) {
                var step = (end - start) / (i - j);
                for (var k = j; k < i; k++) {
                    stops[k].offset = +(+start + step * (k - j)).toFixed(2);
                }
                j = i;
                start = end;
            }
            len--;
            for (var i = 0; i < len; i++) if ("offset" in stops[i]) {
                seed(i, stops[i].offset);
            }
            stops[len].offset = stops[len].offset || 100;
            seed(len, stops[len].offset);
            return {
                type: type,
                params: params,
                stops: stops
            };
        });

        eve.on("snap.util.attr.d", function (value) {
            eve.stop();
            if (is(value, "array") && is(value[0], "array")) {
                value = Snap.path.toString.call(value);
            }
            value = Str(value);
            if (value.match(/[ruo]/i)) {
                value = Snap.path.toAbsolute(value);
            }
            $(this.node, { d: value });
        })(-1);
        eve.on("snap.util.attr.#text", function (value) {
            eve.stop();
            value = Str(value);
            var txt = glob.doc.createTextNode(value);
            while (this.node.firstChild) {
                this.node.removeChild(this.node.firstChild);
            }
            this.node.appendChild(txt);
        })(-1);
        eve.on("snap.util.attr.path", function (value) {
            eve.stop();
            this.attr({ d: value });
        })(-1);
        eve.on("snap.util.attr.class", function (value) {
            eve.stop();
            this.node.className.baseVal = value;
        })(-1);
        eve.on("snap.util.attr.viewBox", function (value) {
            var vb;
            if (is(value, "object") && "x" in value) {
                vb = [value.x, value.y, value.width, value.height].join(" ");
            } else if (is(value, "array")) {
                vb = value.join(" ");
            } else {
                vb = value;
            }
            $(this.node, {
                viewBox: vb
            });
            eve.stop();
        })(-1);
        eve.on("snap.util.attr.transform", function (value) {
            this.transform(value);
            eve.stop();
        })(-1);
        eve.on("snap.util.attr.r", function (value) {
            if (this.type == "rect") {
                eve.stop();
                $(this.node, {
                    rx: value,
                    ry: value
                });
            }
        })(-1);
        eve.on("snap.util.attr.textpath", function (value) {
            eve.stop();
            if (this.type == "text") {
                var id, tp, node;
                if (!value && this.textPath) {
                    tp = this.textPath;
                    while (tp.node.firstChild) {
                        this.node.appendChild(tp.node.firstChild);
                    }
                    tp.remove();
                    delete this.textPath;
                    return;
                }
                if (is(value, "string")) {
                    var defs = getSomeDefs(this),
                        path = wrap(defs.parentNode).path(value);
                    defs.appendChild(path.node);
                    id = path.id;
                    path.attr({ id: id });
                } else {
                    value = wrap(value);
                    if (value instanceof Element) {
                        id = value.attr("id");
                        if (!id) {
                            id = value.id;
                            value.attr({ id: id });
                        }
                    }
                }
                if (id) {
                    tp = this.textPath;
                    node = this.node;
                    if (tp) {
                        tp.attr({ "xlink:href": "#" + id });
                    } else {
                        tp = $("textPath", {
                            "xlink:href": "#" + id
                        });
                        while (node.firstChild) {
                            tp.appendChild(node.firstChild);
                        }
                        node.appendChild(tp);
                        this.textPath = wrap(tp);
                    }
                }
            }
        })(-1);
        eve.on("snap.util.attr.text", function (value) {
            if (this.type == "text") {
                var i = 0,
                    node = this.node,
                    tuner = function (chunk) {
                        var out = $("tspan");
                        if (is(chunk, "array")) {
                            for (var i = 0; i < chunk.length; i++) {
                                out.appendChild(tuner(chunk[i]));
                            }
                        } else {
                            out.appendChild(glob.doc.createTextNode(chunk));
                        }
                        out.normalize && out.normalize();
                        return out;
                    };
                while (node.firstChild) {
                    node.removeChild(node.firstChild);
                }
                var tuned = tuner(value);
                while (tuned.firstChild) {
                    node.appendChild(tuned.firstChild);
                }
            }
            eve.stop();
        })(-1);
        function setFontSize(value) {
            eve.stop();
            if (value == +value) {
                value += "px";
            }
            this.node.style.fontSize = value;
        }
        eve.on("snap.util.attr.fontSize", setFontSize)(-1);
        eve.on("snap.util.attr.font-size", setFontSize)(-1);


        eve.on("snap.util.getattr.transform", function () {
            eve.stop();
            return this.transform();
        })(-1);
        eve.on("snap.util.getattr.textpath", function () {
            eve.stop();
            return this.textPath;
        })(-1);
        // Markers
        (function () {
            function getter(end) {
                return function () {
                    eve.stop();
                    var style = glob.doc.defaultView.getComputedStyle(this.node, null).getPropertyValue("marker-" + end);
                    if (style == "none") {
                        return style;
                    } else {
                        return Snap(glob.doc.getElementById(style.match(reURLValue)[1]));
                    }
                };
            }
            function setter(end) {
                return function (value) {
                    eve.stop();
                    var name = "marker" + end.charAt(0).toUpperCase() + end.substring(1);
                    if (value == "" || !value) {
                        this.node.style[name] = "none";
                        return;
                    }
                    if (value.type == "marker") {
                        var id = value.node.id;
                        if (!id) {
                            $(value.node, { id: value.id });
                        }
                        this.node.style[name] = URL(id);
                        return;
                    }
                };
            }
            eve.on("snap.util.getattr.marker-end", getter("end"))(-1);
            eve.on("snap.util.getattr.markerEnd", getter("end"))(-1);
            eve.on("snap.util.getattr.marker-start", getter("start"))(-1);
            eve.on("snap.util.getattr.markerStart", getter("start"))(-1);
            eve.on("snap.util.getattr.marker-mid", getter("mid"))(-1);
            eve.on("snap.util.getattr.markerMid", getter("mid"))(-1);
            eve.on("snap.util.attr.marker-end", setter("end"))(-1);
            eve.on("snap.util.attr.markerEnd", setter("end"))(-1);
            eve.on("snap.util.attr.marker-start", setter("start"))(-1);
            eve.on("snap.util.attr.markerStart", setter("start"))(-1);
            eve.on("snap.util.attr.marker-mid", setter("mid"))(-1);
            eve.on("snap.util.attr.markerMid", setter("mid"))(-1);
        }());
        eve.on("snap.util.getattr.r", function () {
            if (this.type == "rect" && $(this.node, "rx") == $(this.node, "ry")) {
                eve.stop();
                return $(this.node, "rx");
            }
        })(-1);
        function textExtract(node) {
            var out = [];
            var children = node.childNodes;
            for (var i = 0, ii = children.length; i < ii; i++) {
                var chi = children[i];
                if (chi.nodeType == 3) {
                    out.push(chi.nodeValue);
                }
                if (chi.tagName == "tspan") {
                    if (chi.childNodes.length == 1 && chi.firstChild.nodeType == 3) {
                        out.push(chi.firstChild.nodeValue);
                    } else {
                        out.push(textExtract(chi));
                    }
                }
            }
            return out;
        }
        eve.on("snap.util.getattr.text", function () {
            if (this.type == "text" || this.type == "tspan") {
                eve.stop();
                var out = textExtract(this.node);
                return out.length == 1 ? out[0] : out;
            }
        })(-1);
        eve.on("snap.util.getattr.#text", function () {
            return this.node.textContent;
        })(-1);
        eve.on("snap.util.getattr.fill", function (internal) {
            if (internal) {
                return;
            }
            eve.stop();
            var value = eve("snap.util.getattr.fill", this, true).firstDefined();
            return Snap(Snap.deurl(value)) || value;
        })(-1);
        eve.on("snap.util.getattr.stroke", function (internal) {
            if (internal) {
                return;
            }
            eve.stop();
            var value = eve("snap.util.getattr.stroke", this, true).firstDefined();
            return Snap(Snap.deurl(value)) || value;
        })(-1);
        eve.on("snap.util.getattr.viewBox", function () {
            eve.stop();
            var vb = $(this.node, "viewBox");
            if (vb) {
                vb = vb.split(separator);
                return Snap._.box(+vb[0], +vb[1], +vb[2], +vb[3]);
            } else {
                return;
            }
        })(-1);
        eve.on("snap.util.getattr.points", function () {
            var p = $(this.node, "points");
            eve.stop();
            if (p) {
                return p.split(separator);
            } else {
                return;
            }
        })(-1);
        eve.on("snap.util.getattr.path", function () {
            var p = $(this.node, "d");
            eve.stop();
            return p;
        })(-1);
        eve.on("snap.util.getattr.class", function () {
            return this.node.className.baseVal;
        })(-1);
        function getFontSize() {
            eve.stop();
            return this.node.style.fontSize;
        }
        eve.on("snap.util.getattr.fontSize", getFontSize)(-1);
        eve.on("snap.util.getattr.font-size", getFontSize)(-1);
    });

    // Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var rgNotSpace = /\S+/g,
            rgBadSpace = /[\t\r\n\f]/g,
            rgTrim = /(^\s+|\s+$)/g,
            Str = String,
            elproto = Element.prototype;
        /*\
         * Element.addClass
         [ method ]
         **
         * Adds given class name or list of class names to the element.
         - value (string) class name or space separated list of class names
         **
         = (Element) original element.
        \*/
        elproto.addClass = function (value) {
            var classes = Str(value || "").match(rgNotSpace) || [],
                elem = this.node,
                className = elem.className.baseVal,
                curClasses = className.match(rgNotSpace) || [],
                j,
                pos,
                clazz,
                finalValue;

            if (classes.length) {
                j = 0;
                while (clazz = classes[j++]) {
                    pos = curClasses.indexOf(clazz);
                    if (!~pos) {
                        curClasses.push(clazz);
                    }
                }

                finalValue = curClasses.join(" ");
                if (className != finalValue) {
                    elem.className.baseVal = finalValue;
                }
            }
            return this;
        };
        /*\
         * Element.removeClass
         [ method ]
         **
         * Removes given class name or list of class names from the element.
         - value (string) class name or space separated list of class names
         **
         = (Element) original element.
        \*/
        elproto.removeClass = function (value) {
            var classes = Str(value || "").match(rgNotSpace) || [],
                elem = this.node,
                className = elem.className.baseVal,
                curClasses = className.match(rgNotSpace) || [],
                j,
                pos,
                clazz,
                finalValue;
            if (curClasses.length) {
                j = 0;
                while (clazz = classes[j++]) {
                    pos = curClasses.indexOf(clazz);
                    if (~pos) {
                        curClasses.splice(pos, 1);
                    }
                }

                finalValue = curClasses.join(" ");
                if (className != finalValue) {
                    elem.className.baseVal = finalValue;
                }
            }
            return this;
        };
        /*\
         * Element.hasClass
         [ method ]
         **
         * Checks if the element has a given class name in the list of class names applied to it.
         - value (string) class name
         **
         = (boolean) `true` if the element has given class
        \*/
        elproto.hasClass = function (value) {
            var elem = this.node,
                className = elem.className.baseVal,
                curClasses = className.match(rgNotSpace) || [];
            return !!~curClasses.indexOf(value);
        };
        /*\
         * Element.toggleClass
         [ method ]
         **
         * Add or remove one or more classes from the element, depending on either
         * the class’s presence or the value of the `flag` argument.
         - value (string) class name or space separated list of class names
         - flag (boolean) value to determine whether the class should be added or removed
         **
         = (Element) original element.
        \*/
        elproto.toggleClass = function (value, flag) {
            if (flag != null) {
                if (flag) {
                    return this.addClass(value);
                } else {
                    return this.removeClass(value);
                }
            }
            var classes = (value || "").match(rgNotSpace) || [],
                elem = this.node,
                className = elem.className.baseVal,
                curClasses = className.match(rgNotSpace) || [],
                j,
                pos,
                clazz,
                finalValue;
            j = 0;
            while (clazz = classes[j++]) {
                pos = curClasses.indexOf(clazz);
                if (~pos) {
                    curClasses.splice(pos, 1);
                } else {
                    curClasses.push(clazz);
                }
            }

            finalValue = curClasses.join(" ");
            if (className != finalValue) {
                elem.className.baseVal = finalValue;
            }
            return this;
        };
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var operators = {
            "+": function (x, y) {
                return x + y;
            },
            "-": function (x, y) {
                return x - y;
            },
            "/": function (x, y) {
                return x / y;
            },
            "*": function (x, y) {
                return x * y;
            }
        },
            Str = String,
            reUnit = /[a-z]+$/i,
            reAddon = /^\s*([+\-\/*])\s*=\s*([\d.eE+\-]+)\s*([^\d\s]+)?\s*$/;
        function getNumber(val) {
            return val;
        }
        function getUnit(unit) {
            return function (val) {
                return +val.toFixed(3) + unit;
            };
        }
        eve.on("snap.util.attr", function (val) {
            var plus = Str(val).match(reAddon);
            if (plus) {
                var evnt = eve.nt(),
                    name = evnt.substring(evnt.lastIndexOf(".") + 1),
                    a = this.attr(name),
                    atr = {};
                eve.stop();
                var unit = plus[3] || "",
                    aUnit = a.match(reUnit),
                    op = operators[plus[1]];
                if (aUnit && aUnit == unit) {
                    val = op(parseFloat(a), +plus[2]);
                } else {
                    a = this.asPX(name);
                    val = op(this.asPX(name), this.asPX(name, plus[2] + unit));
                }
                if (isNaN(a) || isNaN(val)) {
                    return;
                }
                atr[name] = val;
                this.attr(atr);
            }
        })(-10);
        eve.on("snap.util.equal", function (name, b) {
            var A, B, a = Str(this.attr(name) || ""),
                el = this,
                bplus = Str(b).match(reAddon);
            if (bplus) {
                eve.stop();
                var unit = bplus[3] || "",
                    aUnit = a.match(reUnit),
                    op = operators[bplus[1]];
                if (aUnit && aUnit == unit) {
                    return {
                        from: parseFloat(a),
                        to: op(parseFloat(a), +bplus[2]),
                        f: getUnit(aUnit)
                    };
                } else {
                    a = this.asPX(name);
                    return {
                        from: a,
                        to: op(a, this.asPX(name, bplus[2] + unit)),
                        f: getNumber
                    };
                }
            }
        })(-10);
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var proto = Paper.prototype,
            is = Snap.is;
        /*\
         * Paper.rect
         [ method ]
         *
         * Draws a rectangle
         **
         - x (number) x coordinate of the top left corner
         - y (number) y coordinate of the top left corner
         - width (number) width
         - height (number) height
         - rx (number) #optional horizontal radius for rounded corners, default is 0
         - ry (number) #optional vertical radius for rounded corners, default is rx or 0
         = (object) the `rect` element
         **
         > Usage
         | // regular rectangle
         | var c = paper.rect(10, 10, 50, 50);
         | // rectangle with rounded corners
         | var c = paper.rect(40, 40, 50, 50, 10);
        \*/
        proto.rect = function (x, y, w, h, rx, ry) {
            var attr;
            if (ry == null) {
                ry = rx;
            }
            if (is(x, "object") && x == "[object Object]") {
                attr = x;
            } else if (x != null) {
                attr = {
                    x: x,
                    y: y,
                    width: w,
                    height: h
                };
                if (rx != null) {
                    attr.rx = rx;
                    attr.ry = ry;
                }
            }
            return this.el("rect", attr);
        };
        /*\
         * Paper.circle
         [ method ]
         **
         * Draws a circle
         **
         - x (number) x coordinate of the centre
         - y (number) y coordinate of the centre
         - r (number) radius
         = (object) the `circle` element
         **
         > Usage
         | var c = paper.circle(50, 50, 40);
        \*/
        proto.circle = function (cx, cy, r) {
            var attr;
            if (is(cx, "object") && cx == "[object Object]") {
                attr = cx;
            } else if (cx != null) {
                attr = {
                    cx: cx,
                    cy: cy,
                    r: r
                };
            }
            return this.el("circle", attr);
        };

        var preload = (function () {
            function onerror() {
                this.parentNode.removeChild(this);
            }
            return function (src, f) {
                var img = glob.doc.createElement("img"),
                    body = glob.doc.body;
                img.style.cssText = "position:absolute;left:-9999em;top:-9999em";
                img.onload = function () {
                    f.call(img);
                    img.onload = img.onerror = null;
                    body.removeChild(img);
                };
                img.onerror = onerror;
                body.appendChild(img);
                img.src = src;
            };
        }());

        /*\
         * Paper.image
         [ method ]
         **
         * Places an image on the surface
         **
         - src (string) URI of the source image
         - x (number) x offset position
         - y (number) y offset position
         - width (number) width of the image
         - height (number) height of the image
         = (object) the `image` element
         * or
         = (object) Snap element object with type `image`
         **
         > Usage
         | var c = paper.image("apple.png", 10, 10, 80, 80);
        \*/
        proto.image = function (src, x, y, width, height) {
            var el = this.el("image");
            if (is(src, "object") && "src" in src) {
                el.attr(src);
            } else if (src != null) {
                var set = {
                    "xlink:href": src,
                    preserveAspectRatio: "none"
                };
                if (x != null && y != null) {
                    set.x = x;
                    set.y = y;
                }
                if (width != null && height != null) {
                    set.width = width;
                    set.height = height;
                } else {
                    preload(src, function () {
                        Snap._.$(el.node, {
                            width: this.offsetWidth,
                            height: this.offsetHeight
                        });
                    });
                }
                Snap._.$(el.node, set);
            }
            return el;
        };
        /*\
         * Paper.ellipse
         [ method ]
         **
         * Draws an ellipse
         **
         - x (number) x coordinate of the centre
         - y (number) y coordinate of the centre
         - rx (number) horizontal radius
         - ry (number) vertical radius
         = (object) the `ellipse` element
         **
         > Usage
         | var c = paper.ellipse(50, 50, 40, 20);
        \*/
        proto.ellipse = function (cx, cy, rx, ry) {
            var attr;
            if (is(cx, "object") && cx == "[object Object]") {
                attr = cx;
            } else if (cx != null) {
                attr = {
                    cx: cx,
                    cy: cy,
                    rx: rx,
                    ry: ry
                };
            }
            return this.el("ellipse", attr);
        };
        // SIERRA Paper.path(): Unclear from the link what a Catmull-Rom curveto is, and why it would make life any easier.
        /*\
         * Paper.path
         [ method ]
         **
         * Creates a `<path>` element using the given string as the path's definition
         - pathString (string) #optional path string in SVG format
         * Path string consists of one-letter commands, followed by comma seprarated arguments in numerical form. Example:
         | "M10,20L30,40"
         * This example features two commands: `M`, with arguments `(10, 20)` and `L` with arguments `(30, 40)`. Uppercase letter commands express coordinates in absolute terms, while lowercase commands express them in relative terms from the most recently declared coordinates.
         *
         # <p>Here is short list of commands available, for more details see <a href="http://www.w3.org/TR/SVG/paths.html#PathData" title="Details of a path's data attribute's format are described in the SVG specification.">SVG path string format</a> or <a href="https://developer.mozilla.org/en/SVG/Tutorial/Paths">article about path strings at MDN</a>.</p>
         # <table><thead><tr><th>Command</th><th>Name</th><th>Parameters</th></tr></thead><tbody>
         # <tr><td>M</td><td>moveto</td><td>(x y)+</td></tr>
         # <tr><td>Z</td><td>closepath</td><td>(none)</td></tr>
         # <tr><td>L</td><td>lineto</td><td>(x y)+</td></tr>
         # <tr><td>H</td><td>horizontal lineto</td><td>x+</td></tr>
         # <tr><td>V</td><td>vertical lineto</td><td>y+</td></tr>
         # <tr><td>C</td><td>curveto</td><td>(x1 y1 x2 y2 x y)+</td></tr>
         # <tr><td>S</td><td>smooth curveto</td><td>(x2 y2 x y)+</td></tr>
         # <tr><td>Q</td><td>quadratic Bézier curveto</td><td>(x1 y1 x y)+</td></tr>
         # <tr><td>T</td><td>smooth quadratic Bézier curveto</td><td>(x y)+</td></tr>
         # <tr><td>A</td><td>elliptical arc</td><td>(rx ry x-axis-rotation large-arc-flag sweep-flag x y)+</td></tr>
         # <tr><td>R</td><td><a href="http://en.wikipedia.org/wiki/Catmull–Rom_spline#Catmull.E2.80.93Rom_spline">Catmull-Rom curveto</a>*</td><td>x1 y1 (x y)+</td></tr></tbody></table>
         * * _Catmull-Rom curveto_ is a not standard SVG command and added to make life easier.
         * Note: there is a special case when a path consists of only three commands: `M10,10R…z`. In this case the path connects back to its starting point.
         > Usage
         | var c = paper.path("M10 10L90 90");
         | // draw a diagonal line:
         | // move to 10,10, line to 90,90
        \*/
        proto.path = function (d) {
            var attr;
            if (is(d, "object") && !is(d, "array")) {
                attr = d;
            } else if (d) {
                attr = { d: d };
            }
            return this.el("path", attr);
        };
        /*\
         * Paper.g
         [ method ]
         **
         * Creates a group element
         **
         - varargs (…) #optional elements to nest within the group
         = (object) the `g` element
         **
         > Usage
         | var c1 = paper.circle(),
         |     c2 = paper.rect(),
         |     g = paper.g(c2, c1); // note that the order of elements is different
         * or
         | var c1 = paper.circle(),
         |     c2 = paper.rect(),
         |     g = paper.g();
         | g.add(c2, c1);
        \*/
        /*\
         * Paper.group
         [ method ]
         **
         * See @Paper.g
        \*/
        proto.group = proto.g = function (first) {
            var attr,
                el = this.el("g");
            if (arguments.length == 1 && first && !first.type) {
                el.attr(first);
            } else if (arguments.length) {
                el.add(Array.prototype.slice.call(arguments, 0));
            }
            return el;
        };
        /*\
         * Paper.svg
         [ method ]
         **
         * Creates a nested SVG element.
         - x (number) @optional X of the element
         - y (number) @optional Y of the element
         - width (number) @optional width of the element
         - height (number) @optional height of the element
         - vbx (number) @optional viewbox X
         - vby (number) @optional viewbox Y
         - vbw (number) @optional viewbox width
         - vbh (number) @optional viewbox height
         **
         = (object) the `svg` element
         **
        \*/
        proto.svg = function (x, y, width, height, vbx, vby, vbw, vbh) {
            var attrs = {};
            if (is(x, "object") && y == null) {
                attrs = x;
            } else {
                if (x != null) {
                    attrs.x = x;
                }
                if (y != null) {
                    attrs.y = y;
                }
                if (width != null) {
                    attrs.width = width;
                }
                if (height != null) {
                    attrs.height = height;
                }
                if (vbx != null && vby != null && vbw != null && vbh != null) {
                    attrs.viewBox = [vbx, vby, vbw, vbh];
                }
            }
            return this.el("svg", attrs);
        };
        /*\
         * Paper.mask
         [ method ]
         **
         * Equivalent in behaviour to @Paper.g, except it’s a mask.
         **
         = (object) the `mask` element
         **
        \*/
        proto.mask = function (first) {
            var attr,
                el = this.el("mask");
            if (arguments.length == 1 && first && !first.type) {
                el.attr(first);
            } else if (arguments.length) {
                el.add(Array.prototype.slice.call(arguments, 0));
            }
            return el;
        };
        /*\
         * Paper.ptrn
         [ method ]
         **
         * Equivalent in behaviour to @Paper.g, except it’s a pattern.
         - x (number) @optional X of the element
         - y (number) @optional Y of the element
         - width (number) @optional width of the element
         - height (number) @optional height of the element
         - vbx (number) @optional viewbox X
         - vby (number) @optional viewbox Y
         - vbw (number) @optional viewbox width
         - vbh (number) @optional viewbox height
         **
         = (object) the `pattern` element
         **
        \*/
        proto.ptrn = function (x, y, width, height, vx, vy, vw, vh) {
            if (is(x, "object")) {
                var attr = x;
            } else {
                attr = { patternUnits: "userSpaceOnUse" };
                if (x) {
                    attr.x = x;
                }
                if (y) {
                    attr.y = y;
                }
                if (width != null) {
                    attr.width = width;
                }
                if (height != null) {
                    attr.height = height;
                }
                if (vx != null && vy != null && vw != null && vh != null) {
                    attr.viewBox = [vx, vy, vw, vh];
                } else {
                    attr.viewBox = [x || 0, y || 0, width || 0, height || 0];
                }
            }
            return this.el("pattern", attr);
        };
        /*\
         * Paper.use
         [ method ]
         **
         * Creates a <use> element.
         - id (string) @optional id of element to link
         * or
         - id (Element) @optional element to link
         **
         = (object) the `use` element
         **
        \*/
        proto.use = function (id) {
            if (id != null) {
                if (id instanceof Element) {
                    if (!id.attr("id")) {
                        id.attr({ id: Snap._.id(id) });
                    }
                    id = id.attr("id");
                }
                if (String(id).charAt() == "#") {
                    id = id.substring(1);
                }
                return this.el("use", { "xlink:href": "#" + id });
            } else {
                return Element.prototype.use.call(this);
            }
        };
        /*\
         * Paper.symbol
         [ method ]
         **
         * Creates a <symbol> element.
         - vbx (number) @optional viewbox X
         - vby (number) @optional viewbox Y
         - vbw (number) @optional viewbox width
         - vbh (number) @optional viewbox height
         = (object) the `symbol` element
         **
        \*/
        proto.symbol = function (vx, vy, vw, vh) {
            var attr = {};
            if (vx != null && vy != null && vw != null && vh != null) {
                attr.viewBox = [vx, vy, vw, vh];
            }

            return this.el("symbol", attr);
        };
        /*\
         * Paper.text
         [ method ]
         **
         * Draws a text string
         **
         - x (number) x coordinate position
         - y (number) y coordinate position
         - text (string|array) The text string to draw or array of strings to nest within separate `<tspan>` elements
         = (object) the `text` element
         **
         > Usage
         | var t1 = paper.text(50, 50, "Snap");
         | var t2 = paper.text(50, 50, ["S","n","a","p"]);
         | // Text path usage
         | t1.attr({textpath: "M10,10L100,100"});
         | // or
         | var pth = paper.path("M10,10L100,100");
         | t1.attr({textpath: pth});
        \*/
        proto.text = function (x, y, text) {
            var attr = {};
            if (is(x, "object")) {
                attr = x;
            } else if (x != null) {
                attr = {
                    x: x,
                    y: y,
                    text: text || ""
                };
            }
            return this.el("text", attr);
        };
        /*\
         * Paper.line
         [ method ]
         **
         * Draws a line
         **
         - x1 (number) x coordinate position of the start
         - y1 (number) y coordinate position of the start
         - x2 (number) x coordinate position of the end
         - y2 (number) y coordinate position of the end
         = (object) the `line` element
         **
         > Usage
         | var t1 = paper.line(50, 50, 100, 100);
        \*/
        proto.line = function (x1, y1, x2, y2) {
            var attr = {};
            if (is(x1, "object")) {
                attr = x1;
            } else if (x1 != null) {
                attr = {
                    x1: x1,
                    x2: x2,
                    y1: y1,
                    y2: y2
                };
            }
            return this.el("line", attr);
        };
        /*\
         * Paper.polyline
         [ method ]
         **
         * Draws a polyline
         **
         - points (array) array of points
         * or
         - varargs (…) points
         = (object) the `polyline` element
         **
         > Usage
         | var p1 = paper.polyline([10, 10, 100, 100]);
         | var p2 = paper.polyline(10, 10, 100, 100);
        \*/
        proto.polyline = function (points) {
            if (arguments.length > 1) {
                points = Array.prototype.slice.call(arguments, 0);
            }
            var attr = {};
            if (is(points, "object") && !is(points, "array")) {
                attr = points;
            } else if (points != null) {
                attr = { points: points };
            }
            return this.el("polyline", attr);
        };
        /*\
         * Paper.polygon
         [ method ]
         **
         * Draws a polygon. See @Paper.polyline
        \*/
        proto.polygon = function (points) {
            if (arguments.length > 1) {
                points = Array.prototype.slice.call(arguments, 0);
            }
            var attr = {};
            if (is(points, "object") && !is(points, "array")) {
                attr = points;
            } else if (points != null) {
                attr = { points: points };
            }
            return this.el("polygon", attr);
        };
        // gradients
        (function () {
            var $ = Snap._.$;
            // gradients' helpers
            /*\
             * Element.stops
             [ method ]
             **
             * Only for gradients!
             * Returns array of gradient stops elements.
             = (array) the stops array.
            \*/
            function Gstops() {
                return this.selectAll("stop");
            }
            /*\
             * Element.addStop
             [ method ]
             **
             * Only for gradients!
             * Adds another stop to the gradient.
             - color (string) stops color
             - offset (number) stops offset 0..100
             = (object) gradient element
            \*/
            function GaddStop(color, offset) {
                var stop = $("stop"),
                    attr = {
                        offset: +offset + "%"
                    };
                color = Snap.color(color);
                attr["stop-color"] = color.hex;
                if (color.opacity < 1) {
                    attr["stop-opacity"] = color.opacity;
                }
                $(stop, attr);
                var stops = this.stops(),
                    inserted;
                for (var i = 0; i < stops.length; i++) {
                    var stopOffset = parseFloat(stops[i].attr("offset"));
                    if (stopOffset > offset) {
                        this.node.insertBefore(stop, stops[i].node);
                        inserted = true;
                        break;
                    }
                }
                if (!inserted) {
                    this.node.appendChild(stop);
                }
                return this;
            }
            function GgetBBox() {
                if (this.type == "linearGradient") {
                    var x1 = $(this.node, "x1") || 0,
                        x2 = $(this.node, "x2") || 1,
                        y1 = $(this.node, "y1") || 0,
                        y2 = $(this.node, "y2") || 0;
                    return Snap._.box(x1, y1, math.abs(x2 - x1), math.abs(y2 - y1));
                } else {
                    var cx = this.node.cx || .5,
                        cy = this.node.cy || .5,
                        r = this.node.r || 0;
                    return Snap._.box(cx - r, cy - r, r * 2, r * 2);
                }
            }
            /*\
             * Element.setStops
             [ method ]
             **
             * Only for gradients!
             * Updates stops of the gradient based on passed gradient descriptor. See @Ppaer.gradient
             - str (string) gradient descriptor part after `()`.
             = (object) gradient element
             | var g = paper.gradient("l(0, 0, 1, 1)#000-#f00-#fff");
             | g.setStops("#fff-#000-#f00-#fc0");
            \*/
            function GsetStops(str) {
                var grad = str,
                    stops = this.stops();
                if (typeof str == "string") {
                    grad = eve("snap.util.grad.parse", null, "l(0,0,0,1)" + str).firstDefined().stops;
                }
                if (!Snap.is(grad, "array")) {
                    return;
                }
                for (var i = 0; i < stops.length; i++) {
                    if (grad[i]) {
                        var color = Snap.color(grad[i].color),
                            attr = { "offset": grad[i].offset + "%" };
                        attr["stop-color"] = color.hex;
                        if (color.opacity < 1) {
                            attr["stop-opacity"] = color.opacity;
                        }
                        stops[i].attr(attr);
                    } else {
                        stops[i].remove();
                    }
                }
                for (i = stops.length; i < grad.length; i++) {
                    this.addStop(grad[i].color, grad[i].offset);
                }
                return this;
            }
            function gradient(defs, str) {
                var grad = eve("snap.util.grad.parse", null, str).firstDefined(),
                    el;
                if (!grad) {
                    return null;
                }
                grad.params.unshift(defs);
                if (grad.type.toLowerCase() == "l") {
                    el = gradientLinear.apply(0, grad.params);
                } else {
                    el = gradientRadial.apply(0, grad.params);
                }
                if (grad.type != grad.type.toLowerCase()) {
                    $(el.node, {
                        gradientUnits: "userSpaceOnUse"
                    });
                }
                var stops = grad.stops,
                    len = stops.length;
                for (var i = 0; i < len; i++) {
                    var stop = stops[i];
                    el.addStop(stop.color, stop.offset);
                }
                return el;
            }
            function gradientLinear(defs, x1, y1, x2, y2) {
                var el = Snap._.make("linearGradient", defs);
                el.stops = Gstops;
                el.addStop = GaddStop;
                el.getBBox = GgetBBox;
                el.setStops = GsetStops;
                if (x1 != null) {
                    $(el.node, {
                        x1: x1,
                        y1: y1,
                        x2: x2,
                        y2: y2
                    });
                }
                return el;
            }
            function gradientRadial(defs, cx, cy, r, fx, fy) {
                var el = Snap._.make("radialGradient", defs);
                el.stops = Gstops;
                el.addStop = GaddStop;
                el.getBBox = GgetBBox;
                if (cx != null) {
                    $(el.node, {
                        cx: cx,
                        cy: cy,
                        r: r
                    });
                }
                if (fx != null && fy != null) {
                    $(el.node, {
                        fx: fx,
                        fy: fy
                    });
                }
                return el;
            }
            /*\
             * Paper.gradient
             [ method ]
             **
             * Creates a gradient element
             **
             - gradient (string) gradient descriptor
             > Gradient Descriptor
             * The gradient descriptor is an expression formatted as
             * follows: `<type>(<coords>)<colors>`.  The `<type>` can be
             * either linear or radial.  The uppercase `L` or `R` letters
             * indicate absolute coordinates offset from the SVG surface.
             * Lowercase `l` or `r` letters indicate coordinates
             * calculated relative to the element to which the gradient is
             * applied.  Coordinates specify a linear gradient vector as
             * `x1`, `y1`, `x2`, `y2`, or a radial gradient as `cx`, `cy`,
             * `r` and optional `fx`, `fy` specifying a focal point away
             * from the center of the circle. Specify `<colors>` as a list
             * of dash-separated CSS color values.  Each color may be
             * followed by a custom offset value, separated with a colon
             * character.
             > Examples
             * Linear gradient, relative from top-left corner to bottom-right
             * corner, from black through red to white:
             | var g = paper.gradient("l(0, 0, 1, 1)#000-#f00-#fff");
             * Linear gradient, absolute from (0, 0) to (100, 100), from black
             * through red at 25% to white:
             | var g = paper.gradient("L(0, 0, 100, 100)#000-#f00:25-#fff");
             * Radial gradient, relative from the center of the element with radius
             * half the width, from black to white:
             | var g = paper.gradient("r(0.5, 0.5, 0.5)#000-#fff");
             * To apply the gradient:
             | paper.circle(50, 50, 40).attr({
             |     fill: g
             | });
             = (object) the `gradient` element
            \*/
            proto.gradient = function (str) {
                return gradient(this.defs, str);
            };
            proto.gradientLinear = function (x1, y1, x2, y2) {
                return gradientLinear(this.defs, x1, y1, x2, y2);
            };
            proto.gradientRadial = function (cx, cy, r, fx, fy) {
                return gradientRadial(this.defs, cx, cy, r, fx, fy);
            };
            /*\
             * Paper.toString
             [ method ]
             **
             * Returns SVG code for the @Paper
             = (string) SVG code for the @Paper
            \*/
            proto.toString = function () {
                var doc = this.node.ownerDocument,
                    f = doc.createDocumentFragment(),
                    d = doc.createElement("div"),
                    svg = this.node.cloneNode(true),
                    res;
                f.appendChild(d);
                d.appendChild(svg);
                Snap._.$(svg, { xmlns: "http://www.w3.org/2000/svg" });
                res = d.innerHTML;
                f.removeChild(f.firstChild);
                return res;
            };
            /*\
             * Paper.toDataURL
             [ method ]
             **
             * Returns SVG code for the @Paper as Data URI string.
             = (string) Data URI string
            \*/
            proto.toDataURL = function () {
                if (window && window.btoa) {
                    return "data:image/svg+xml;base64," + btoa(unescape(encodeURIComponent(this)));
                }
            };
            /*\
             * Paper.clear
             [ method ]
             **
             * Removes all child nodes of the paper, except <defs>.
            \*/
            proto.clear = function () {
                var node = this.node.firstChild,
                    next;
                while (node) {
                    next = node.nextSibling;
                    if (node.tagName != "defs") {
                        node.parentNode.removeChild(node);
                    } else {
                        proto.clear.call({ node: node });
                    }
                    node = next;
                }
            };
        }());
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob) {
        var elproto = Element.prototype,
            is = Snap.is,
            clone = Snap._.clone,
            has = "hasOwnProperty",
            p2s = /,?([a-z]),?/gi,
            toFloat = parseFloat,
            math = Math,
            PI = math.PI,
            mmin = math.min,
            mmax = math.max,
            pow = math.pow,
            abs = math.abs;
        function paths(ps) {
            var p = paths.ps = paths.ps || {};
            if (p[ps]) {
                p[ps].sleep = 100;
            } else {
                p[ps] = {
                    sleep: 100
                };
            }
            setTimeout(function () {
                for (var key in p) if (p[has](key) && key != ps) {
                    p[key].sleep--;
                    !p[key].sleep && delete p[key];
                }
            });
            return p[ps];
        }
        function box(x, y, width, height) {
            if (x == null) {
                x = y = width = height = 0;
            }
            if (y == null) {
                y = x.y;
                width = x.width;
                height = x.height;
                x = x.x;
            }
            return {
                x: x,
                y: y,
                width: width,
                w: width,
                height: height,
                h: height,
                x2: x + width,
                y2: y + height,
                cx: x + width / 2,
                cy: y + height / 2,
                r1: math.min(width, height) / 2,
                r2: math.max(width, height) / 2,
                r0: math.sqrt(width * width + height * height) / 2,
                path: rectPath(x, y, width, height),
                vb: [x, y, width, height].join(" ")
            };
        }
        function toString() {
            return this.join(",").replace(p2s, "$1");
        }
        function pathClone(pathArray) {
            var res = clone(pathArray);
            res.toString = toString;
            return res;
        }
        function getPointAtSegmentLength(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length) {
            if (length == null) {
                return bezlen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y);
            } else {
                return findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y,
                    getTotLen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length));
            }
        }
        function getLengthFactory(istotal, subpath) {
            function O(val) {
                return +(+val).toFixed(3);
            }
            return Snap._.cacher(function (path, length, onlystart) {
                if (path instanceof Element) {
                    path = path.attr("d");
                }
                path = path2curve(path);
                var x, y, p, l, sp = "", subpaths = {}, point,
                    len = 0;
                for (var i = 0, ii = path.length; i < ii; i++) {
                    p = path[i];
                    if (p[0] == "M") {
                        x = +p[1];
                        y = +p[2];
                    } else {
                        l = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
                        if (len + l > length) {
                            if (subpath && !subpaths.start) {
                                point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);
                                sp += [
                                    "C" + O(point.start.x),
                                    O(point.start.y),
                                    O(point.m.x),
                                    O(point.m.y),
                                    O(point.x),
                                    O(point.y)
                                ];
                                if (onlystart) { return sp; }
                                subpaths.start = sp;
                                sp = [
                                    "M" + O(point.x),
                                    O(point.y) + "C" + O(point.n.x),
                                    O(point.n.y),
                                    O(point.end.x),
                                    O(point.end.y),
                                    O(p[5]),
                                    O(p[6])
                                ].join();
                                len += l;
                                x = +p[5];
                                y = +p[6];
                                continue;
                            }
                            if (!istotal && !subpath) {
                                point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);
                                return point;
                            }
                        }
                        len += l;
                        x = +p[5];
                        y = +p[6];
                    }
                    sp += p.shift() + p;
                }
                subpaths.end = sp;
                point = istotal ? len : subpath ? subpaths : findDotsAtSegment(x, y, p[0], p[1], p[2], p[3], p[4], p[5], 1);
                return point;
            }, null, Snap._.clone);
        }
        var getTotalLength = getLengthFactory(1),
            getPointAtLength = getLengthFactory(),
            getSubpathsAtLength = getLengthFactory(0, 1);
        function findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
            var t1 = 1 - t,
                t13 = pow(t1, 3),
                t12 = pow(t1, 2),
                t2 = t * t,
                t3 = t2 * t,
                x = t13 * p1x + t12 * 3 * t * c1x + t1 * 3 * t * t * c2x + t3 * p2x,
                y = t13 * p1y + t12 * 3 * t * c1y + t1 * 3 * t * t * c2y + t3 * p2y,
                mx = p1x + 2 * t * (c1x - p1x) + t2 * (c2x - 2 * c1x + p1x),
                my = p1y + 2 * t * (c1y - p1y) + t2 * (c2y - 2 * c1y + p1y),
                nx = c1x + 2 * t * (c2x - c1x) + t2 * (p2x - 2 * c2x + c1x),
                ny = c1y + 2 * t * (c2y - c1y) + t2 * (p2y - 2 * c2y + c1y),
                ax = t1 * p1x + t * c1x,
                ay = t1 * p1y + t * c1y,
                cx = t1 * c2x + t * p2x,
                cy = t1 * c2y + t * p2y,
                alpha = 90 - math.atan2(mx - nx, my - ny) * 180 / PI;
            // (mx > nx || my < ny) && (alpha += 180);
            return {
                x: x,
                y: y,
                m: { x: mx, y: my },
                n: { x: nx, y: ny },
                start: { x: ax, y: ay },
                end: { x: cx, y: cy },
                alpha: alpha
            };
        }
        function bezierBBox(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y) {
            if (!Snap.is(p1x, "array")) {
                p1x = [p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y];
            }
            var bbox = curveDim.apply(null, p1x);
            return box(
                bbox.min.x,
                bbox.min.y,
                bbox.max.x - bbox.min.x,
                bbox.max.y - bbox.min.y
            );
        }
        function isPointInsideBBox(bbox, x, y) {
            return x >= bbox.x &&
                x <= bbox.x + bbox.width &&
                y >= bbox.y &&
                y <= bbox.y + bbox.height;
        }
        function isBBoxIntersect(bbox1, bbox2) {
            bbox1 = box(bbox1);
            bbox2 = box(bbox2);
            return isPointInsideBBox(bbox2, bbox1.x, bbox1.y)
                || isPointInsideBBox(bbox2, bbox1.x2, bbox1.y)
                || isPointInsideBBox(bbox2, bbox1.x, bbox1.y2)
                || isPointInsideBBox(bbox2, bbox1.x2, bbox1.y2)
                || isPointInsideBBox(bbox1, bbox2.x, bbox2.y)
                || isPointInsideBBox(bbox1, bbox2.x2, bbox2.y)
                || isPointInsideBBox(bbox1, bbox2.x, bbox2.y2)
                || isPointInsideBBox(bbox1, bbox2.x2, bbox2.y2)
                || (bbox1.x < bbox2.x2 && bbox1.x > bbox2.x
                    || bbox2.x < bbox1.x2 && bbox2.x > bbox1.x)
                && (bbox1.y < bbox2.y2 && bbox1.y > bbox2.y
                    || bbox2.y < bbox1.y2 && bbox2.y > bbox1.y);
        }
        function base3(t, p1, p2, p3, p4) {
            var t1 = -3 * p1 + 9 * p2 - 9 * p3 + 3 * p4,
                t2 = t * t1 + 6 * p1 - 12 * p2 + 6 * p3;
            return t * t2 - 3 * p1 + 3 * p2;
        }
        function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {
            if (z == null) {
                z = 1;
            }
            z = z > 1 ? 1 : z < 0 ? 0 : z;
            var z2 = z / 2,
                n = 12,
                Tvalues = [-.1252, .1252, -.3678, .3678, -.5873, .5873, -.7699, .7699, -.9041, .9041, -.9816, .9816],
                Cvalues = [0.2491, 0.2491, 0.2335, 0.2335, 0.2032, 0.2032, 0.1601, 0.1601, 0.1069, 0.1069, 0.0472, 0.0472],
                sum = 0;
            for (var i = 0; i < n; i++) {
                var ct = z2 * Tvalues[i] + z2,
                    xbase = base3(ct, x1, x2, x3, x4),
                    ybase = base3(ct, y1, y2, y3, y4),
                    comb = xbase * xbase + ybase * ybase;
                sum += Cvalues[i] * math.sqrt(comb);
            }
            return z2 * sum;
        }
        function getTotLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {
            if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {
                return;
            }
            var t = 1,
                step = t / 2,
                t2 = t - step,
                l,
                e = .01;
            l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
            while (abs(l - ll) > e) {
                step /= 2;
                t2 += (l < ll ? 1 : -1) * step;
                l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
            }
            return t2;
        }
        function intersect(x1, y1, x2, y2, x3, y3, x4, y4) {
            if (
                mmax(x1, x2) < mmin(x3, x4) ||
                mmin(x1, x2) > mmax(x3, x4) ||
                mmax(y1, y2) < mmin(y3, y4) ||
                mmin(y1, y2) > mmax(y3, y4)
            ) {
                return;
            }
            var nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4),
                ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4),
                denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);

            if (!denominator) {
                return;
            }
            var px = nx / denominator,
                py = ny / denominator,
                px2 = +px.toFixed(2),
                py2 = +py.toFixed(2);
            if (
                px2 < +mmin(x1, x2).toFixed(2) ||
                px2 > +mmax(x1, x2).toFixed(2) ||
                px2 < +mmin(x3, x4).toFixed(2) ||
                px2 > +mmax(x3, x4).toFixed(2) ||
                py2 < +mmin(y1, y2).toFixed(2) ||
                py2 > +mmax(y1, y2).toFixed(2) ||
                py2 < +mmin(y3, y4).toFixed(2) ||
                py2 > +mmax(y3, y4).toFixed(2)
            ) {
                return;
            }
            return { x: px, y: py };
        }
        function inter(bez1, bez2) {
            return interHelper(bez1, bez2);
        }
        function interCount(bez1, bez2) {
            return interHelper(bez1, bez2, 1);
        }
        function interHelper(bez1, bez2, justCount) {
            var bbox1 = bezierBBox(bez1),
                bbox2 = bezierBBox(bez2);
            if (!isBBoxIntersect(bbox1, bbox2)) {
                return justCount ? 0 : [];
            }
            var l1 = bezlen.apply(0, bez1),
                l2 = bezlen.apply(0, bez2),
                n1 = ~~(l1 / 8),
                n2 = ~~(l2 / 8),
                dots1 = [],
                dots2 = [],
                xy = {},
                res = justCount ? 0 : [];
            for (var i = 0; i < n1 + 1; i++) {
                var p = findDotsAtSegment.apply(0, bez1.concat(i / n1));
                dots1.push({ x: p.x, y: p.y, t: i / n1 });
            }
            for (i = 0; i < n2 + 1; i++) {
                p = findDotsAtSegment.apply(0, bez2.concat(i / n2));
                dots2.push({ x: p.x, y: p.y, t: i / n2 });
            }
            for (i = 0; i < n1; i++) {
                for (var j = 0; j < n2; j++) {
                    var di = dots1[i],
                        di1 = dots1[i + 1],
                        dj = dots2[j],
                        dj1 = dots2[j + 1],
                        ci = abs(di1.x - di.x) < .001 ? "y" : "x",
                        cj = abs(dj1.x - dj.x) < .001 ? "y" : "x",
                        is = intersect(di.x, di.y, di1.x, di1.y, dj.x, dj.y, dj1.x, dj1.y);
                    if (is) {
                        if (xy[is.x.toFixed(4)] == is.y.toFixed(4)) {
                            continue;
                        }
                        xy[is.x.toFixed(4)] = is.y.toFixed(4);
                        var t1 = di.t + abs((is[ci] - di[ci]) / (di1[ci] - di[ci])) * (di1.t - di.t),
                            t2 = dj.t + abs((is[cj] - dj[cj]) / (dj1[cj] - dj[cj])) * (dj1.t - dj.t);
                        if (t1 >= 0 && t1 <= 1 && t2 >= 0 && t2 <= 1) {
                            if (justCount) {
                                res++;
                            } else {
                                res.push({
                                    x: is.x,
                                    y: is.y,
                                    t1: t1,
                                    t2: t2
                                });
                            }
                        }
                    }
                }
            }
            return res;
        }
        function pathIntersection(path1, path2) {
            return interPathHelper(path1, path2);
        }
        function pathIntersectionNumber(path1, path2) {
            return interPathHelper(path1, path2, 1);
        }
        function interPathHelper(path1, path2, justCount) {
            path1 = path2curve(path1);
            path2 = path2curve(path2);
            var x1, y1, x2, y2, x1m, y1m, x2m, y2m, bez1, bez2,
                res = justCount ? 0 : [];
            for (var i = 0, ii = path1.length; i < ii; i++) {
                var pi = path1[i];
                if (pi[0] == "M") {
                    x1 = x1m = pi[1];
                    y1 = y1m = pi[2];
                } else {
                    if (pi[0] == "C") {
                        bez1 = [x1, y1].concat(pi.slice(1));
                        x1 = bez1[6];
                        y1 = bez1[7];
                    } else {
                        bez1 = [x1, y1, x1, y1, x1m, y1m, x1m, y1m];
                        x1 = x1m;
                        y1 = y1m;
                    }
                    for (var j = 0, jj = path2.length; j < jj; j++) {
                        var pj = path2[j];
                        if (pj[0] == "M") {
                            x2 = x2m = pj[1];
                            y2 = y2m = pj[2];
                        } else {
                            if (pj[0] == "C") {
                                bez2 = [x2, y2].concat(pj.slice(1));
                                x2 = bez2[6];
                                y2 = bez2[7];
                            } else {
                                bez2 = [x2, y2, x2, y2, x2m, y2m, x2m, y2m];
                                x2 = x2m;
                                y2 = y2m;
                            }
                            var intr = interHelper(bez1, bez2, justCount);
                            if (justCount) {
                                res += intr;
                            } else {
                                for (var k = 0, kk = intr.length; k < kk; k++) {
                                    intr[k].segment1 = i;
                                    intr[k].segment2 = j;
                                    intr[k].bez1 = bez1;
                                    intr[k].bez2 = bez2;
                                }
                                res = res.concat(intr);
                            }
                        }
                    }
                }
            }
            return res;
        }
        function isPointInsidePath(path, x, y) {
            var bbox = pathBBox(path);
            return isPointInsideBBox(bbox, x, y) &&
                interPathHelper(path, [["M", x, y], ["H", bbox.x2 + 10]], 1) % 2 == 1;
        }
        function pathBBox(path) {
            var pth = paths(path);
            if (pth.bbox) {
                return clone(pth.bbox);
            }
            if (!path) {
                return box();
            }
            path = path2curve(path);
            var x = 0,
                y = 0,
                X = [],
                Y = [],
                p;
            for (var i = 0, ii = path.length; i < ii; i++) {
                p = path[i];
                if (p[0] == "M") {
                    x = p[1];
                    y = p[2];
                    X.push(x);
                    Y.push(y);
                } else {
                    var dim = curveDim(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
                    X = X.concat(dim.min.x, dim.max.x);
                    Y = Y.concat(dim.min.y, dim.max.y);
                    x = p[5];
                    y = p[6];
                }
            }
            var xmin = mmin.apply(0, X),
                ymin = mmin.apply(0, Y),
                xmax = mmax.apply(0, X),
                ymax = mmax.apply(0, Y),
                bb = box(xmin, ymin, xmax - xmin, ymax - ymin);
            pth.bbox = clone(bb);
            return bb;
        }
        function rectPath(x, y, w, h, r) {
            if (r) {
                return [
                    ["M", +x + +r, y],
                    ["l", w - r * 2, 0],
                    ["a", r, r, 0, 0, 1, r, r],
                    ["l", 0, h - r * 2],
                    ["a", r, r, 0, 0, 1, -r, r],
                    ["l", r * 2 - w, 0],
                    ["a", r, r, 0, 0, 1, -r, -r],
                    ["l", 0, r * 2 - h],
                    ["a", r, r, 0, 0, 1, r, -r],
                    ["z"]
                ];
            }
            var res = [["M", x, y], ["l", w, 0], ["l", 0, h], ["l", -w, 0], ["z"]];
            res.toString = toString;
            return res;
        }
        function ellipsePath(x, y, rx, ry, a) {
            if (a == null && ry == null) {
                ry = rx;
            }
            x = +x;
            y = +y;
            rx = +rx;
            ry = +ry;
            if (a != null) {
                var rad = Math.PI / 180,
                    x1 = x + rx * Math.cos(-ry * rad),
                    x2 = x + rx * Math.cos(-a * rad),
                    y1 = y + rx * Math.sin(-ry * rad),
                    y2 = y + rx * Math.sin(-a * rad),
                    res = [["M", x1, y1], ["A", rx, rx, 0, +(a - ry > 180), 0, x2, y2]];
            } else {
                res = [
                    ["M", x, y],
                    ["m", 0, -ry],
                    ["a", rx, ry, 0, 1, 1, 0, 2 * ry],
                    ["a", rx, ry, 0, 1, 1, 0, -2 * ry],
                    ["z"]
                ];
            }
            res.toString = toString;
            return res;
        }
        var unit2px = Snap._unit2px,
            getPath = {
                path: function (el) {
                    return el.attr("path");
                },
                circle: function (el) {
                    var attr = unit2px(el);
                    return ellipsePath(attr.cx, attr.cy, attr.r);
                },
                ellipse: function (el) {
                    var attr = unit2px(el);
                    return ellipsePath(attr.cx || 0, attr.cy || 0, attr.rx, attr.ry);
                },
                rect: function (el) {
                    var attr = unit2px(el);
                    return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height, attr.rx, attr.ry);
                },
                image: function (el) {
                    var attr = unit2px(el);
                    return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height);
                },
                line: function (el) {
                    return "M" + [el.attr("x1") || 0, el.attr("y1") || 0, el.attr("x2"), el.attr("y2")];
                },
                polyline: function (el) {
                    return "M" + el.attr("points");
                },
                polygon: function (el) {
                    return "M" + el.attr("points") + "z";
                },
                deflt: function (el) {
                    var bbox = el.node.getBBox();
                    return rectPath(bbox.x, bbox.y, bbox.width, bbox.height);
                }
            };
        function pathToRelative(pathArray) {
            var pth = paths(pathArray),
                lowerCase = String.prototype.toLowerCase;
            if (pth.rel) {
                return pathClone(pth.rel);
            }
            if (!Snap.is(pathArray, "array") || !Snap.is(pathArray && pathArray[0], "array")) {
                pathArray = Snap.parsePathString(pathArray);
            }
            var res = [],
                x = 0,
                y = 0,
                mx = 0,
                my = 0,
                start = 0;
            if (pathArray[0][0] == "M") {
                x = pathArray[0][1];
                y = pathArray[0][2];
                mx = x;
                my = y;
                start++;
                res.push(["M", x, y]);
            }
            for (var i = start, ii = pathArray.length; i < ii; i++) {
                var r = res[i] = [],
                    pa = pathArray[i];
                if (pa[0] != lowerCase.call(pa[0])) {
                    r[0] = lowerCase.call(pa[0]);
                    switch (r[0]) {
                        case "a":
                            r[1] = pa[1];
                            r[2] = pa[2];
                            r[3] = pa[3];
                            r[4] = pa[4];
                            r[5] = pa[5];
                            r[6] = +(pa[6] - x).toFixed(3);
                            r[7] = +(pa[7] - y).toFixed(3);
                            break;
                        case "v":
                            r[1] = +(pa[1] - y).toFixed(3);
                            break;
                        case "m":
                            mx = pa[1];
                            my = pa[2];
                        default:
                            for (var j = 1, jj = pa.length; j < jj; j++) {
                                r[j] = +(pa[j] - (j % 2 ? x : y)).toFixed(3);
                            }
                    }
                } else {
                    r = res[i] = [];
                    if (pa[0] == "m") {
                        mx = pa[1] + x;
                        my = pa[2] + y;
                    }
                    for (var k = 0, kk = pa.length; k < kk; k++) {
                        res[i][k] = pa[k];
                    }
                }
                var len = res[i].length;
                switch (res[i][0]) {
                    case "z":
                        x = mx;
                        y = my;
                        break;
                    case "h":
                        x += +res[i][len - 1];
                        break;
                    case "v":
                        y += +res[i][len - 1];
                        break;
                    default:
                        x += +res[i][len - 2];
                        y += +res[i][len - 1];
                }
            }
            res.toString = toString;
            pth.rel = pathClone(res);
            return res;
        }
        function pathToAbsolute(pathArray) {
            var pth = paths(pathArray);
            if (pth.abs) {
                return pathClone(pth.abs);
            }
            if (!is(pathArray, "array") || !is(pathArray && pathArray[0], "array")) { // rough assumption
                pathArray = Snap.parsePathString(pathArray);
            }
            if (!pathArray || !pathArray.length) {
                return [["M", 0, 0]];
            }
            var res = [],
                x = 0,
                y = 0,
                mx = 0,
                my = 0,
                start = 0,
                pa0;
            if (pathArray[0][0] == "M") {
                x = +pathArray[0][1];
                y = +pathArray[0][2];
                mx = x;
                my = y;
                start++;
                res[0] = ["M", x, y];
            }
            var crz = pathArray.length == 3 &&
                pathArray[0][0] == "M" &&
                pathArray[1][0].toUpperCase() == "R" &&
                pathArray[2][0].toUpperCase() == "Z";
            for (var r, pa, i = start, ii = pathArray.length; i < ii; i++) {
                res.push(r = []);
                pa = pathArray[i];
                pa0 = pa[0];
                if (pa0 != pa0.toUpperCase()) {
                    r[0] = pa0.toUpperCase();
                    switch (r[0]) {
                        case "A":
                            r[1] = pa[1];
                            r[2] = pa[2];
                            r[3] = pa[3];
                            r[4] = pa[4];
                            r[5] = pa[5];
                            r[6] = +pa[6] + x;
                            r[7] = +pa[7] + y;
                            break;
                        case "V":
                            r[1] = +pa[1] + y;
                            break;
                        case "H":
                            r[1] = +pa[1] + x;
                            break;
                        case "R":
                            var dots = [x, y].concat(pa.slice(1));
                            for (var j = 2, jj = dots.length; j < jj; j++) {
                                dots[j] = +dots[j] + x;
                                dots[++j] = +dots[j] + y;
                            }
                            res.pop();
                            res = res.concat(catmullRom2bezier(dots, crz));
                            break;
                        case "O":
                            res.pop();
                            dots = ellipsePath(x, y, pa[1], pa[2]);
                            dots.push(dots[0]);
                            res = res.concat(dots);
                            break;
                        case "U":
                            res.pop();
                            res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));
                            r = ["U"].concat(res[res.length - 1].slice(-2));
                            break;
                        case "M":
                            mx = +pa[1] + x;
                            my = +pa[2] + y;
                        default:
                            for (j = 1, jj = pa.length; j < jj; j++) {
                                r[j] = +pa[j] + (j % 2 ? x : y);
                            }
                    }
                } else if (pa0 == "R") {
                    dots = [x, y].concat(pa.slice(1));
                    res.pop();
                    res = res.concat(catmullRom2bezier(dots, crz));
                    r = ["R"].concat(pa.slice(-2));
                } else if (pa0 == "O") {
                    res.pop();
                    dots = ellipsePath(x, y, pa[1], pa[2]);
                    dots.push(dots[0]);
                    res = res.concat(dots);
                } else if (pa0 == "U") {
                    res.pop();
                    res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));
                    r = ["U"].concat(res[res.length - 1].slice(-2));
                } else {
                    for (var k = 0, kk = pa.length; k < kk; k++) {
                        r[k] = pa[k];
                    }
                }
                pa0 = pa0.toUpperCase();
                if (pa0 != "O") {
                    switch (r[0]) {
                        case "Z":
                            x = +mx;
                            y = +my;
                            break;
                        case "H":
                            x = r[1];
                            break;
                        case "V":
                            y = r[1];
                            break;
                        case "M":
                            mx = r[r.length - 2];
                            my = r[r.length - 1];
                        default:
                            x = r[r.length - 2];
                            y = r[r.length - 1];
                    }
                }
            }
            res.toString = toString;
            pth.abs = pathClone(res);
            return res;
        }
        function l2c(x1, y1, x2, y2) {
            return [x1, y1, x2, y2, x2, y2];
        }
        function q2c(x1, y1, ax, ay, x2, y2) {
            var _13 = 1 / 3,
                _23 = 2 / 3;
            return [
                _13 * x1 + _23 * ax,
                _13 * y1 + _23 * ay,
                _13 * x2 + _23 * ax,
                _13 * y2 + _23 * ay,
                x2,
                y2
            ];
        }
        function a2c(x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2, recursive) {
            // for more information of where this math came from visit:
            // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
            var _120 = PI * 120 / 180,
                rad = PI / 180 * (+angle || 0),
                res = [],
                xy,
                rotate = Snap._.cacher(function (x, y, rad) {
                    var X = x * math.cos(rad) - y * math.sin(rad),
                        Y = x * math.sin(rad) + y * math.cos(rad);
                    return { x: X, y: Y };
                });
            if (!rx || !ry) {
                return [x1, y1, x2, y2, x2, y2];
            }
            if (!recursive) {
                xy = rotate(x1, y1, -rad);
                x1 = xy.x;
                y1 = xy.y;
                xy = rotate(x2, y2, -rad);
                x2 = xy.x;
                y2 = xy.y;
                var cos = math.cos(PI / 180 * angle),
                    sin = math.sin(PI / 180 * angle),
                    x = (x1 - x2) / 2,
                    y = (y1 - y2) / 2;
                var h = x * x / (rx * rx) + y * y / (ry * ry);
                if (h > 1) {
                    h = math.sqrt(h);
                    rx = h * rx;
                    ry = h * ry;
                }
                var rx2 = rx * rx,
                    ry2 = ry * ry,
                    k = (large_arc_flag == sweep_flag ? -1 : 1) *
                        math.sqrt(abs((rx2 * ry2 - rx2 * y * y - ry2 * x * x) / (rx2 * y * y + ry2 * x * x))),
                    cx = k * rx * y / ry + (x1 + x2) / 2,
                    cy = k * -ry * x / rx + (y1 + y2) / 2,
                    f1 = math.asin(((y1 - cy) / ry).toFixed(9)),
                    f2 = math.asin(((y2 - cy) / ry).toFixed(9));

                f1 = x1 < cx ? PI - f1 : f1;
                f2 = x2 < cx ? PI - f2 : f2;
                f1 < 0 && (f1 = PI * 2 + f1);
                f2 < 0 && (f2 = PI * 2 + f2);
                if (sweep_flag && f1 > f2) {
                    f1 = f1 - PI * 2;
                }
                if (!sweep_flag && f2 > f1) {
                    f2 = f2 - PI * 2;
                }
            } else {
                f1 = recursive[0];
                f2 = recursive[1];
                cx = recursive[2];
                cy = recursive[3];
            }
            var df = f2 - f1;
            if (abs(df) > _120) {
                var f2old = f2,
                    x2old = x2,
                    y2old = y2;
                f2 = f1 + _120 * (sweep_flag && f2 > f1 ? 1 : -1);
                x2 = cx + rx * math.cos(f2);
                y2 = cy + ry * math.sin(f2);
                res = a2c(x2, y2, rx, ry, angle, 0, sweep_flag, x2old, y2old, [f2, f2old, cx, cy]);
            }
            df = f2 - f1;
            var c1 = math.cos(f1),
                s1 = math.sin(f1),
                c2 = math.cos(f2),
                s2 = math.sin(f2),
                t = math.tan(df / 4),
                hx = 4 / 3 * rx * t,
                hy = 4 / 3 * ry * t,
                m1 = [x1, y1],
                m2 = [x1 + hx * s1, y1 - hy * c1],
                m3 = [x2 + hx * s2, y2 - hy * c2],
                m4 = [x2, y2];
            m2[0] = 2 * m1[0] - m2[0];
            m2[1] = 2 * m1[1] - m2[1];
            if (recursive) {
                return [m2, m3, m4].concat(res);
            } else {
                res = [m2, m3, m4].concat(res).join().split(",");
                var newres = [];
                for (var i = 0, ii = res.length; i < ii; i++) {
                    newres[i] = i % 2 ? rotate(res[i - 1], res[i], rad).y : rotate(res[i], res[i + 1], rad).x;
                }
                return newres;
            }
        }
        function findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
            var t1 = 1 - t;
            return {
                x: pow(t1, 3) * p1x + pow(t1, 2) * 3 * t * c1x + t1 * 3 * t * t * c2x + pow(t, 3) * p2x,
                y: pow(t1, 3) * p1y + pow(t1, 2) * 3 * t * c1y + t1 * 3 * t * t * c2y + pow(t, 3) * p2y
            };
        }

        // Returns bounding box of cubic bezier curve.
        // Source: http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
        // Original version: NISHIO Hirokazu
        // Modifications: https://github.com/timo22345
        function curveDim(x0, y0, x1, y1, x2, y2, x3, y3) {
            var tvalues = [],
                bounds = [[], []],
                a, b, c, t, t1, t2, b2ac, sqrtb2ac;
            for (var i = 0; i < 2; ++i) {
                if (i == 0) {
                    b = 6 * x0 - 12 * x1 + 6 * x2;
                    a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;
                    c = 3 * x1 - 3 * x0;
                } else {
                    b = 6 * y0 - 12 * y1 + 6 * y2;
                    a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;
                    c = 3 * y1 - 3 * y0;
                }
                if (abs(a) < 1e-12) {
                    if (abs(b) < 1e-12) {
                        continue;
                    }
                    t = -c / b;
                    if (0 < t && t < 1) {
                        tvalues.push(t);
                    }
                    continue;
                }
                b2ac = b * b - 4 * c * a;
                sqrtb2ac = math.sqrt(b2ac);
                if (b2ac < 0) {
                    continue;
                }
                t1 = (-b + sqrtb2ac) / (2 * a);
                if (0 < t1 && t1 < 1) {
                    tvalues.push(t1);
                }
                t2 = (-b - sqrtb2ac) / (2 * a);
                if (0 < t2 && t2 < 1) {
                    tvalues.push(t2);
                }
            }

            var x, y, j = tvalues.length,
                jlen = j,
                mt;
            while (j--) {
                t = tvalues[j];
                mt = 1 - t;
                bounds[0][j] = mt * mt * mt * x0 + 3 * mt * mt * t * x1 + 3 * mt * t * t * x2 + t * t * t * x3;
                bounds[1][j] = mt * mt * mt * y0 + 3 * mt * mt * t * y1 + 3 * mt * t * t * y2 + t * t * t * y3;
            }

            bounds[0][jlen] = x0;
            bounds[1][jlen] = y0;
            bounds[0][jlen + 1] = x3;
            bounds[1][jlen + 1] = y3;
            bounds[0].length = bounds[1].length = jlen + 2;


            return {
                min: { x: mmin.apply(0, bounds[0]), y: mmin.apply(0, bounds[1]) },
                max: { x: mmax.apply(0, bounds[0]), y: mmax.apply(0, bounds[1]) }
            };
        }

        function path2curve(path, path2) {
            var pth = !path2 && paths(path);
            if (!path2 && pth.curve) {
                return pathClone(pth.curve);
            }
            var p = pathToAbsolute(path),
                p2 = path2 && pathToAbsolute(path2),
                attrs = { x: 0, y: 0, bx: 0, by: 0, X: 0, Y: 0, qx: null, qy: null },
                attrs2 = { x: 0, y: 0, bx: 0, by: 0, X: 0, Y: 0, qx: null, qy: null },
                processPath = function (path, d, pcom) {
                    var nx, ny;
                    if (!path) {
                        return ["C", d.x, d.y, d.x, d.y, d.x, d.y];
                    }
                    !(path[0] in { T: 1, Q: 1 }) && (d.qx = d.qy = null);
                    switch (path[0]) {
                        case "M":
                            d.X = path[1];
                            d.Y = path[2];
                            break;
                        case "A":
                            path = ["C"].concat(a2c.apply(0, [d.x, d.y].concat(path.slice(1))));
                            break;
                        case "S":
                            if (pcom == "C" || pcom == "S") { // In "S" case we have to take into account, if the previous command is C/S.
                                nx = d.x * 2 - d.bx;          // And reflect the previous
                                ny = d.y * 2 - d.by;          // command's control point relative to the current point.
                            }
                            else {                            // or some else or nothing
                                nx = d.x;
                                ny = d.y;
                            }
                            path = ["C", nx, ny].concat(path.slice(1));
                            break;
                        case "T":
                            if (pcom == "Q" || pcom == "T") { // In "T" case we have to take into account, if the previous command is Q/T.
                                d.qx = d.x * 2 - d.qx;        // And make a reflection similar
                                d.qy = d.y * 2 - d.qy;        // to case "S".
                            }
                            else {                            // or something else or nothing
                                d.qx = d.x;
                                d.qy = d.y;
                            }
                            path = ["C"].concat(q2c(d.x, d.y, d.qx, d.qy, path[1], path[2]));
                            break;
                        case "Q":
                            d.qx = path[1];
                            d.qy = path[2];
                            path = ["C"].concat(q2c(d.x, d.y, path[1], path[2], path[3], path[4]));
                            break;
                        case "L":
                            path = ["C"].concat(l2c(d.x, d.y, path[1], path[2]));
                            break;
                        case "H":
                            path = ["C"].concat(l2c(d.x, d.y, path[1], d.y));
                            break;
                        case "V":
                            path = ["C"].concat(l2c(d.x, d.y, d.x, path[1]));
                            break;
                        case "Z":
                            path = ["C"].concat(l2c(d.x, d.y, d.X, d.Y));
                            break;
                    }
                    return path;
                },
                fixArc = function (pp, i) {
                    if (pp[i].length > 7) {
                        pp[i].shift();
                        var pi = pp[i];
                        while (pi.length) {
                            pcoms1[i] = "A"; // if created multiple C:s, their original seg is saved
                            p2 && (pcoms2[i] = "A"); // the same as above
                            pp.splice(i++, 0, ["C"].concat(pi.splice(0, 6)));
                        }
                        pp.splice(i, 1);
                        ii = mmax(p.length, p2 && p2.length || 0);
                    }
                },
                fixM = function (path1, path2, a1, a2, i) {
                    if (path1 && path2 && path1[i][0] == "M" && path2[i][0] != "M") {
                        path2.splice(i, 0, ["M", a2.x, a2.y]);
                        a1.bx = 0;
                        a1.by = 0;
                        a1.x = path1[i][1];
                        a1.y = path1[i][2];
                        ii = mmax(p.length, p2 && p2.length || 0);
                    }
                },
                pcoms1 = [], // path commands of original path p
                pcoms2 = [], // path commands of original path p2
                pfirst = "", // temporary holder for original path command
                pcom = ""; // holder for previous path command of original path
            for (var i = 0, ii = mmax(p.length, p2 && p2.length || 0); i < ii; i++) {
                p[i] && (pfirst = p[i][0]); // save current path command

                if (pfirst != "C") // C is not saved yet, because it may be result of conversion
                {
                    pcoms1[i] = pfirst; // Save current path command
                    i && (pcom = pcoms1[i - 1]); // Get previous path command pcom
                }
                p[i] = processPath(p[i], attrs, pcom); // Previous path command is inputted to processPath

                if (pcoms1[i] != "A" && pfirst == "C") pcoms1[i] = "C"; // A is the only command
                // which may produce multiple C:s
                // so we have to make sure that C is also C in original path

                fixArc(p, i); // fixArc adds also the right amount of A:s to pcoms1

                if (p2) { // the same procedures is done to p2
                    p2[i] && (pfirst = p2[i][0]);
                    if (pfirst != "C") {
                        pcoms2[i] = pfirst;
                        i && (pcom = pcoms2[i - 1]);
                    }
                    p2[i] = processPath(p2[i], attrs2, pcom);

                    if (pcoms2[i] != "A" && pfirst == "C") {
                        pcoms2[i] = "C";
                    }

                    fixArc(p2, i);
                }
                fixM(p, p2, attrs, attrs2, i);
                fixM(p2, p, attrs2, attrs, i);
                var seg = p[i],
                    seg2 = p2 && p2[i],
                    seglen = seg.length,
                    seg2len = p2 && seg2.length;
                attrs.x = seg[seglen - 2];
                attrs.y = seg[seglen - 1];
                attrs.bx = toFloat(seg[seglen - 4]) || attrs.x;
                attrs.by = toFloat(seg[seglen - 3]) || attrs.y;
                attrs2.bx = p2 && (toFloat(seg2[seg2len - 4]) || attrs2.x);
                attrs2.by = p2 && (toFloat(seg2[seg2len - 3]) || attrs2.y);
                attrs2.x = p2 && seg2[seg2len - 2];
                attrs2.y = p2 && seg2[seg2len - 1];
            }
            if (!p2) {
                pth.curve = pathClone(p);
            }
            return p2 ? [p, p2] : p;
        }
        function mapPath(path, matrix) {
            if (!matrix) {
                return path;
            }
            var x, y, i, j, ii, jj, pathi;
            path = path2curve(path);
            for (i = 0, ii = path.length; i < ii; i++) {
                pathi = path[i];
                for (j = 1, jj = pathi.length; j < jj; j += 2) {
                    x = matrix.x(pathi[j], pathi[j + 1]);
                    y = matrix.y(pathi[j], pathi[j + 1]);
                    pathi[j] = x;
                    pathi[j + 1] = y;
                }
            }
            return path;
        }

        // http://schepers.cc/getting-to-the-point
        function catmullRom2bezier(crp, z) {
            var d = [];
            for (var i = 0, iLen = crp.length; iLen - 2 * !z > i; i += 2) {
                var p = [
                    { x: +crp[i - 2], y: +crp[i - 1] },
                    { x: +crp[i], y: +crp[i + 1] },
                    { x: +crp[i + 2], y: +crp[i + 3] },
                    { x: +crp[i + 4], y: +crp[i + 5] }
                ];
                if (z) {
                    if (!i) {
                        p[0] = { x: +crp[iLen - 2], y: +crp[iLen - 1] };
                    } else if (iLen - 4 == i) {
                        p[3] = { x: +crp[0], y: +crp[1] };
                    } else if (iLen - 2 == i) {
                        p[2] = { x: +crp[0], y: +crp[1] };
                        p[3] = { x: +crp[2], y: +crp[3] };
                    }
                } else {
                    if (iLen - 4 == i) {
                        p[3] = p[2];
                    } else if (!i) {
                        p[0] = { x: +crp[i], y: +crp[i + 1] };
                    }
                }
                d.push(["C",
                    (-p[0].x + 6 * p[1].x + p[2].x) / 6,
                    (-p[0].y + 6 * p[1].y + p[2].y) / 6,
                    (p[1].x + 6 * p[2].x - p[3].x) / 6,
                    (p[1].y + 6 * p[2].y - p[3].y) / 6,
                    p[2].x,
                    p[2].y
                ]);
            }

            return d;
        }

        // export
        Snap.path = paths;

        /*\
         * Snap.path.getTotalLength
         [ method ]
         **
         * Returns the length of the given path in pixels
         **
         - path (string) SVG path string
         **
         = (number) length
        \*/
        Snap.path.getTotalLength = getTotalLength;
        /*\
         * Snap.path.getPointAtLength
         [ method ]
         **
         * Returns the coordinates of the point located at the given length along the given path
         **
         - path (string) SVG path string
         - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps
         **
         = (object) representation of the point:
         o {
         o     x: (number) x coordinate,
         o     y: (number) y coordinate,
         o     alpha: (number) angle of derivative
         o }
        \*/
        Snap.path.getPointAtLength = getPointAtLength;
        /*\
         * Snap.path.getSubpath
         [ method ]
         **
         * Returns the subpath of a given path between given start and end lengths
         **
         - path (string) SVG path string
         - from (number) length, in pixels, from the start of the path to the start of the segment
         - to (number) length, in pixels, from the start of the path to the end of the segment
         **
         = (string) path string definition for the segment
        \*/
        Snap.path.getSubpath = function (path, from, to) {
            if (this.getTotalLength(path) - to < 1e-6) {
                return getSubpathsAtLength(path, from).end;
            }
            var a = getSubpathsAtLength(path, to, 1);
            return from ? getSubpathsAtLength(a, from).end : a;
        };
        /*\
         * Element.getTotalLength
         [ method ]
         **
         * Returns the length of the path in pixels (only works for `path` elements)
         = (number) length
        \*/
        elproto.getTotalLength = function () {
            if (this.node.getTotalLength) {
                return this.node.getTotalLength();
            }
        };
        // SIERRA Element.getPointAtLength()/Element.getTotalLength(): If a <path> is broken into different segments, is the jump distance to the new coordinates set by the _M_ or _m_ commands calculated as part of the path's total length?
        /*\
         * Element.getPointAtLength
         [ method ]
         **
         * Returns coordinates of the point located at the given length on the given path (only works for `path` elements)
         **
         - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps
         **
         = (object) representation of the point:
         o {
         o     x: (number) x coordinate,
         o     y: (number) y coordinate,
         o     alpha: (number) angle of derivative
         o }
        \*/
        elproto.getPointAtLength = function (length) {
            return getPointAtLength(this.attr("d"), length);
        };
        // SIERRA Element.getSubpath(): Similar to the problem for Element.getPointAtLength(). Unclear how this would work for a segmented path. Overall, the concept of _subpath_ and what I'm calling a _segment_ (series of non-_M_ or _Z_ commands) is unclear.
        /*\
         * Element.getSubpath
         [ method ]
         **
         * Returns subpath of a given element from given start and end lengths (only works for `path` elements)
         **
         - from (number) length, in pixels, from the start of the path to the start of the segment
         - to (number) length, in pixels, from the start of the path to the end of the segment
         **
         = (string) path string definition for the segment
        \*/
        elproto.getSubpath = function (from, to) {
            return Snap.path.getSubpath(this.attr("d"), from, to);
        };
        Snap._.box = box;
        /*\
         * Snap.path.findDotsAtSegment
         [ method ]
         **
         * Utility method
         **
         * Finds dot coordinates on the given cubic beziér curve at the given t
         - p1x (number) x of the first point of the curve
         - p1y (number) y of the first point of the curve
         - c1x (number) x of the first anchor of the curve
         - c1y (number) y of the first anchor of the curve
         - c2x (number) x of the second anchor of the curve
         - c2y (number) y of the second anchor of the curve
         - p2x (number) x of the second point of the curve
         - p2y (number) y of the second point of the curve
         - t (number) position on the curve (0..1)
         = (object) point information in format:
         o {
         o     x: (number) x coordinate of the point,
         o     y: (number) y coordinate of the point,
         o     m: {
         o         x: (number) x coordinate of the left anchor,
         o         y: (number) y coordinate of the left anchor
         o     },
         o     n: {
         o         x: (number) x coordinate of the right anchor,
         o         y: (number) y coordinate of the right anchor
         o     },
         o     start: {
         o         x: (number) x coordinate of the start of the curve,
         o         y: (number) y coordinate of the start of the curve
         o     },
         o     end: {
         o         x: (number) x coordinate of the end of the curve,
         o         y: (number) y coordinate of the end of the curve
         o     },
         o     alpha: (number) angle of the curve derivative at the point
         o }
        \*/
        Snap.path.findDotsAtSegment = findDotsAtSegment;
        /*\
         * Snap.path.bezierBBox
         [ method ]
         **
         * Utility method
         **
         * Returns the bounding box of a given cubic beziér curve
         - p1x (number) x of the first point of the curve
         - p1y (number) y of the first point of the curve
         - c1x (number) x of the first anchor of the curve
         - c1y (number) y of the first anchor of the curve
         - c2x (number) x of the second anchor of the curve
         - c2y (number) y of the second anchor of the curve
         - p2x (number) x of the second point of the curve
         - p2y (number) y of the second point of the curve
         * or
         - bez (array) array of six points for beziér curve
         = (object) bounding box
         o {
         o     x: (number) x coordinate of the left top point of the box,
         o     y: (number) y coordinate of the left top point of the box,
         o     x2: (number) x coordinate of the right bottom point of the box,
         o     y2: (number) y coordinate of the right bottom point of the box,
         o     width: (number) width of the box,
         o     height: (number) height of the box
         o }
        \*/
        Snap.path.bezierBBox = bezierBBox;
        /*\
         * Snap.path.isPointInsideBBox
         [ method ]
         **
         * Utility method
         **
         * Returns `true` if given point is inside bounding box
         - bbox (string) bounding box
         - x (string) x coordinate of the point
         - y (string) y coordinate of the point
         = (boolean) `true` if point is inside
        \*/
        Snap.path.isPointInsideBBox = isPointInsideBBox;
        Snap.closest = function (x, y, X, Y) {
            var r = 100,
                b = box(x - r / 2, y - r / 2, r, r),
                inside = [],
                getter = X[0].hasOwnProperty("x") ? function (i) {
                    return {
                        x: X[i].x,
                        y: X[i].y
                    };
                } : function (i) {
                    return {
                        x: X[i],
                        y: Y[i]
                    };
                },
                found = 0;
            while (r <= 1e6 && !found) {
                for (var i = 0, ii = X.length; i < ii; i++) {
                    var xy = getter(i);
                    if (isPointInsideBBox(b, xy.x, xy.y)) {
                        found++;
                        inside.push(xy);
                        break;
                    }
                }
                if (!found) {
                    r *= 2;
                    b = box(x - r / 2, y - r / 2, r, r)
                }
            }
            if (r == 1e6) {
                return;
            }
            var len = Infinity,
                res;
            for (i = 0, ii = inside.length; i < ii; i++) {
                var l = Snap.len(x, y, inside[i].x, inside[i].y);
                if (len > l) {
                    len = l;
                    inside[i].len = l;
                    res = inside[i];
                }
            }
            return res;
        };
        /*\
         * Snap.path.isBBoxIntersect
         [ method ]
         **
         * Utility method
         **
         * Returns `true` if two bounding boxes intersect
         - bbox1 (string) first bounding box
         - bbox2 (string) second bounding box
         = (boolean) `true` if bounding boxes intersect
        \*/
        Snap.path.isBBoxIntersect = isBBoxIntersect;
        /*\
         * Snap.path.intersection
         [ method ]
         **
         * Utility method
         **
         * Finds intersections of two paths
         - path1 (string) path string
         - path2 (string) path string
         = (array) dots of intersection
         o [
         o     {
         o         x: (number) x coordinate of the point,
         o         y: (number) y coordinate of the point,
         o         t1: (number) t value for segment of path1,
         o         t2: (number) t value for segment of path2,
         o         segment1: (number) order number for segment of path1,
         o         segment2: (number) order number for segment of path2,
         o         bez1: (array) eight coordinates representing beziér curve for the segment of path1,
         o         bez2: (array) eight coordinates representing beziér curve for the segment of path2
         o     }
         o ]
        \*/
        Snap.path.intersection = pathIntersection;
        Snap.path.intersectionNumber = pathIntersectionNumber;
        /*\
         * Snap.path.isPointInside
         [ method ]
         **
         * Utility method
         **
         * Returns `true` if given point is inside a given closed path.
         *
         * Note: fill mode doesn’t affect the result of this method.
         - path (string) path string
         - x (number) x of the point
         - y (number) y of the point
         = (boolean) `true` if point is inside the path
        \*/
        Snap.path.isPointInside = isPointInsidePath;
        /*\
         * Snap.path.getBBox
         [ method ]
         **
         * Utility method
         **
         * Returns the bounding box of a given path
         - path (string) path string
         = (object) bounding box
         o {
         o     x: (number) x coordinate of the left top point of the box,
         o     y: (number) y coordinate of the left top point of the box,
         o     x2: (number) x coordinate of the right bottom point of the box,
         o     y2: (number) y coordinate of the right bottom point of the box,
         o     width: (number) width of the box,
         o     height: (number) height of the box
         o }
        \*/
        Snap.path.getBBox = pathBBox;
        Snap.path.get = getPath;
        /*\
         * Snap.path.toRelative
         [ method ]
         **
         * Utility method
         **
         * Converts path coordinates into relative values
         - path (string) path string
         = (array) path string
        \*/
        Snap.path.toRelative = pathToRelative;
        /*\
         * Snap.path.toAbsolute
         [ method ]
         **
         * Utility method
         **
         * Converts path coordinates into absolute values
         - path (string) path string
         = (array) path string
        \*/
        Snap.path.toAbsolute = pathToAbsolute;
        /*\
         * Snap.path.toCubic
         [ method ]
         **
         * Utility method
         **
         * Converts path to a new path where all segments are cubic beziér curves
         - pathString (string|array) path string or array of segments
         = (array) array of segments
        \*/
        Snap.path.toCubic = path2curve;
        /*\
         * Snap.path.map
         [ method ]
         **
         * Transform the path string with the given matrix
         - path (string) path string
         - matrix (object) see @Matrix
         = (string) transformed path string
        \*/
        Snap.path.map = mapPath;
        Snap.path.toString = toString;
        Snap.path.clone = pathClone;
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob) {
        var mmax = Math.max,
            mmin = Math.min;

        // Set
        var Set = function (items) {
            this.items = [];
            this.bindings = {};
            this.length = 0;
            this.type = "set";
            if (items) {
                for (var i = 0, ii = items.length; i < ii; i++) {
                    if (items[i]) {
                        this[this.items.length] = this.items[this.items.length] = items[i];
                        this.length++;
                    }
                }
            }
        },
            setproto = Set.prototype;
        /*\
         * Set.push
         [ method ]
         **
         * Adds each argument to the current set
         = (object) original element
        \*/
        setproto.push = function () {
            var item,
                len;
            for (var i = 0, ii = arguments.length; i < ii; i++) {
                item = arguments[i];
                if (item) {
                    len = this.items.length;
                    this[len] = this.items[len] = item;
                    this.length++;
                }
            }
            return this;
        };
        /*\
         * Set.pop
         [ method ]
         **
         * Removes last element and returns it
         = (object) element
        \*/
        setproto.pop = function () {
            this.length && delete this[this.length--];
            return this.items.pop();
        };
        /*\
         * Set.forEach
         [ method ]
         **
         * Executes given function for each element in the set
         *
         * If the function returns `false`, the loop stops running.
         **
         - callback (function) function to run
         - thisArg (object) context object for the callback
         = (object) Set object
        \*/
        setproto.forEach = function (callback, thisArg) {
            for (var i = 0, ii = this.items.length; i < ii; i++) {
                if (callback.call(thisArg, this.items[i], i) === false) {
                    return this;
                }
            }
            return this;
        };
        /*\
         * Set.animate
         [ method ]
         **
         * Animates each element in set in sync.
         *
         **
         - attrs (object) key-value pairs of destination attributes
         - duration (number) duration of the animation in milliseconds
         - easing (function) #optional easing function from @mina or custom
         - callback (function) #optional callback function that executes when the animation ends
         * or
         - animation (array) array of animation parameter for each element in set in format `[attrs, duration, easing, callback]`
         > Usage
         | // animate all elements in set to radius 10
         | set.animate({r: 10}, 500, mina.easein);
         | // or
         | // animate first element to radius 10, but second to radius 20 and in different time
         | set.animate([{r: 10}, 500, mina.easein], [{r: 20}, 1500, mina.easein]);
         = (Element) the current element
        \*/
        setproto.animate = function (attrs, ms, easing, callback) {
            if (typeof easing == "function" && !easing.length) {
                callback = easing;
                easing = mina.linear;
            }
            if (attrs instanceof Snap._.Animation) {
                callback = attrs.callback;
                easing = attrs.easing;
                ms = easing.dur;
                attrs = attrs.attr;
            }
            var args = arguments;
            if (Snap.is(attrs, "array") && Snap.is(args[args.length - 1], "array")) {
                var each = true;
            }
            var begin,
                handler = function () {
                    if (begin) {
                        this.b = begin;
                    } else {
                        begin = this.b;
                    }
                },
                cb = 0,
                set = this,
                callbacker = callback && function () {
                    if (++cb == set.length) {
                        callback.call(this);
                    }
                };
            return this.forEach(function (el, i) {
                eve.once("snap.animcreated." + el.id, handler);
                if (each) {
                    args[i] && el.animate.apply(el, args[i]);
                } else {
                    el.animate(attrs, ms, easing, callbacker);
                }
            });
        };
        /*\
         * Set.remove
         [ method ]
         **
         * Removes all children of the set.
         *
         = (object) Set object
        \*/
        setproto.remove = function () {
            while (this.length) {
                this.pop().remove();
            }
            return this;
        };
        /*\
         * Set.bind
         [ method ]
         **
         * Specifies how to handle a specific attribute when applied
         * to a set.
         *
         **
         - attr (string) attribute name
         - callback (function) function to run
         * or
         - attr (string) attribute name
         - element (Element) specific element in the set to apply the attribute to
         * or
         - attr (string) attribute name
         - element (Element) specific element in the set to apply the attribute to
         - eattr (string) attribute on the element to bind the attribute to
         = (object) Set object
        \*/
        setproto.bind = function (attr, a, b) {
            var data = {};
            if (typeof a == "function") {
                this.bindings[attr] = a;
            } else {
                var aname = b || attr;
                this.bindings[attr] = function (v) {
                    data[aname] = v;
                    a.attr(data);
                };
            }
            return this;
        };
        /*\
         * Set.attr
         [ method ]
         **
         * Equivalent of @Element.attr.
         = (object) Set object
        \*/
        setproto.attr = function (value) {
            var unbound = {};
            for (var k in value) {
                if (this.bindings[k]) {
                    this.bindings[k](value[k]);
                } else {
                    unbound[k] = value[k];
                }
            }
            for (var i = 0, ii = this.items.length; i < ii; i++) {
                this.items[i].attr(unbound);
            }
            return this;
        };
        /*\
         * Set.clear
         [ method ]
         **
         * Removes all elements from the set
        \*/
        setproto.clear = function () {
            while (this.length) {
                this.pop();
            }
        };
        /*\
         * Set.splice
         [ method ]
         **
         * Removes range of elements from the set
         **
         - index (number) position of the deletion
         - count (number) number of element to remove
         - insertion… (object) #optional elements to insert
         = (object) set elements that were deleted
        \*/
        setproto.splice = function (index, count, insertion) {
            index = index < 0 ? mmax(this.length + index, 0) : index;
            count = mmax(0, mmin(this.length - index, count));
            var tail = [],
                todel = [],
                args = [],
                i;
            for (i = 2; i < arguments.length; i++) {
                args.push(arguments[i]);
            }
            for (i = 0; i < count; i++) {
                todel.push(this[index + i]);
            }
            for (; i < this.length - index; i++) {
                tail.push(this[index + i]);
            }
            var arglen = args.length;
            for (i = 0; i < arglen + tail.length; i++) {
                this.items[index + i] = this[index + i] = i < arglen ? args[i] : tail[i - arglen];
            }
            i = this.items.length = this.length -= count - arglen;
            while (this[i]) {
                delete this[i++];
            }
            return new Set(todel);
        };
        /*\
         * Set.exclude
         [ method ]
         **
         * Removes given element from the set
         **
         - element (object) element to remove
         = (boolean) `true` if object was found and removed from the set
        \*/
        setproto.exclude = function (el) {
            for (var i = 0, ii = this.length; i < ii; i++) if (this[i] == el) {
                this.splice(i, 1);
                return true;
            }
            return false;
        };
        /*\
         * Set.insertAfter
         [ method ]
         **
         * Inserts set elements after given element.
         **
         - element (object) set will be inserted after this element
         = (object) Set object
        \*/
        setproto.insertAfter = function (el) {
            var i = this.items.length;
            while (i--) {
                this.items[i].insertAfter(el);
            }
            return this;
        };
        /*\
         * Set.getBBox
         [ method ]
         **
         * Union of all bboxes of the set. See @Element.getBBox.
         = (object) bounding box descriptor. See @Element.getBBox.
        \*/
        setproto.getBBox = function () {
            var x = [],
                y = [],
                x2 = [],
                y2 = [];
            for (var i = this.items.length; i--;) if (!this.items[i].removed) {
                var box = this.items[i].getBBox();
                x.push(box.x);
                y.push(box.y);
                x2.push(box.x + box.width);
                y2.push(box.y + box.height);
            }
            x = mmin.apply(0, x);
            y = mmin.apply(0, y);
            x2 = mmax.apply(0, x2);
            y2 = mmax.apply(0, y2);
            return {
                x: x,
                y: y,
                x2: x2,
                y2: y2,
                width: x2 - x,
                height: y2 - y,
                cx: x + (x2 - x) / 2,
                cy: y + (y2 - y) / 2
            };
        };
        /*\
         * Set.insertAfter
         [ method ]
         **
         * Creates a clone of the set.
         **
         = (object) New Set object
        \*/
        setproto.clone = function (s) {
            s = new Set;
            for (var i = 0, ii = this.items.length; i < ii; i++) {
                s.push(this.items[i].clone());
            }
            return s;
        };
        setproto.toString = function () {
            return "Snap\u2018s set";
        };
        setproto.type = "set";
        // export
        /*\
         * Snap.Set
         [ property ]
         **
         * Set constructor.
        \*/
        Snap.Set = Set;
        /*\
         * Snap.set
         [ method ]
         **
         * Creates a set and fills it with list of arguments.
         **
         = (object) New Set object
         | var r = paper.rect(0, 0, 10, 10),
         |     s1 = Snap.set(), // empty set
         |     s2 = Snap.set(r, paper.circle(100, 100, 20)); // prefilled set
        \*/
        Snap.set = function () {
            var set = new Set;
            if (arguments.length) {
                set.push.apply(set, Array.prototype.slice.call(arguments, 0));
            }
            return set;
        };
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob) {
        var names = {},
            reUnit = /[%a-z]+$/i,
            Str = String;
        names.stroke = names.fill = "colour";
        function getEmpty(item) {
            var l = item[0];
            switch (l.toLowerCase()) {
                case "t": return [l, 0, 0];
                case "m": return [l, 1, 0, 0, 1, 0, 0];
                case "r": if (item.length == 4) {
                    return [l, 0, item[2], item[3]];
                } else {
                    return [l, 0];
                }
                case "s": if (item.length == 5) {
                    return [l, 1, 1, item[3], item[4]];
                } else if (item.length == 3) {
                    return [l, 1, 1];
                } else {
                    return [l, 1];
                }
            }
        }
        function equaliseTransform(t1, t2, getBBox) {
            t1 = t1 || new Snap.Matrix;
            t2 = t2 || new Snap.Matrix;
            t1 = Snap.parseTransformString(t1.toTransformString()) || [];
            t2 = Snap.parseTransformString(t2.toTransformString()) || [];
            var maxlength = Math.max(t1.length, t2.length),
                from = [],
                to = [],
                i = 0, j, jj,
                tt1, tt2;
            for (; i < maxlength; i++) {
                tt1 = t1[i] || getEmpty(t2[i]);
                tt2 = t2[i] || getEmpty(tt1);
                if (tt1[0] != tt2[0] ||
                    tt1[0].toLowerCase() == "r" && (tt1[2] != tt2[2] || tt1[3] != tt2[3]) ||
                    tt1[0].toLowerCase() == "s" && (tt1[3] != tt2[3] || tt1[4] != tt2[4])
                ) {
                    t1 = Snap._.transform2matrix(t1, getBBox());
                    t2 = Snap._.transform2matrix(t2, getBBox());
                    from = [["m", t1.a, t1.b, t1.c, t1.d, t1.e, t1.f]];
                    to = [["m", t2.a, t2.b, t2.c, t2.d, t2.e, t2.f]];
                    break;
                }
                from[i] = [];
                to[i] = [];
                for (j = 0, jj = Math.max(tt1.length, tt2.length); j < jj; j++) {
                    j in tt1 && (from[i][j] = tt1[j]);
                    j in tt2 && (to[i][j] = tt2[j]);
                }
            }
            return {
                from: path2array(from),
                to: path2array(to),
                f: getPath(from)
            };
        }
        function getNumber(val) {
            return val;
        }
        function getUnit(unit) {
            return function (val) {
                return +val.toFixed(3) + unit;
            };
        }
        function getViewBox(val) {
            return val.join(" ");
        }
        function getColour(clr) {
            return Snap.rgb(clr[0], clr[1], clr[2], clr[3]);
        }
        function getPath(path) {
            var k = 0, i, ii, j, jj, out, a, b = [];
            for (i = 0, ii = path.length; i < ii; i++) {
                out = "[";
                a = ['"' + path[i][0] + '"'];
                for (j = 1, jj = path[i].length; j < jj; j++) {
                    a[j] = "val[" + k++ + "]";
                }
                out += a + "]";
                b[i] = out;
            }
            return Function("val", "return Snap.path.toString.call([" + b + "])");
        }
        function path2array(path) {
            var out = [];
            for (var i = 0, ii = path.length; i < ii; i++) {
                for (var j = 1, jj = path[i].length; j < jj; j++) {
                    out.push(path[i][j]);
                }
            }
            return out;
        }
        function isNumeric(obj) {
            return isFinite(obj);
        }
        function arrayEqual(arr1, arr2) {
            if (!Snap.is(arr1, "array") || !Snap.is(arr2, "array")) {
                return false;
            }
            return arr1.toString() == arr2.toString();
        }
        Element.prototype.equal = function (name, b) {
            return eve("snap.util.equal", this, name, b).firstDefined();
        };
        eve.on("snap.util.equal", function (name, b) {
            var A, B, a = Str(this.attr(name) || ""),
                el = this;
            if (names[name] == "colour") {
                A = Snap.color(a);
                B = Snap.color(b);
                return {
                    from: [A.r, A.g, A.b, A.opacity],
                    to: [B.r, B.g, B.b, B.opacity],
                    f: getColour
                };
            }
            if (name == "viewBox") {
                A = this.attr(name).vb.split(" ").map(Number);
                B = b.split(" ").map(Number);
                return {
                    from: A,
                    to: B,
                    f: getViewBox
                };
            }
            if (name == "transform" || name == "gradientTransform" || name == "patternTransform") {
                if (typeof b == "string") {
                    b = Str(b).replace(/\.{3}|\u2026/g, a);
                }
                a = this.matrix;
                if (!Snap._.rgTransform.test(b)) {
                    b = Snap._.transform2matrix(Snap._.svgTransform2string(b), this.getBBox());
                } else {
                    b = Snap._.transform2matrix(b, this.getBBox());
                }
                return equaliseTransform(a, b, function () {
                    return el.getBBox(1);
                });
            }
            if (name == "d" || name == "path") {
                A = Snap.path.toCubic(a, b);
                return {
                    from: path2array(A[0]),
                    to: path2array(A[1]),
                    f: getPath(A[0])
                };
            }
            if (name == "points") {
                A = Str(a).split(Snap._.separator);
                B = Str(b).split(Snap._.separator);
                return {
                    from: A,
                    to: B,
                    f: function (val) { return val; }
                };
            }
            if (isNumeric(a) && isNumeric(b)) {
                return {
                    from: parseFloat(a),
                    to: parseFloat(b),
                    f: getNumber
                };
            }
            var aUnit = a.match(reUnit),
                bUnit = Str(b).match(reUnit);
            if (aUnit && arrayEqual(aUnit, bUnit)) {
                return {
                    from: parseFloat(a),
                    to: parseFloat(b),
                    f: getUnit(aUnit)
                };
            } else {
                return {
                    from: this.asPX(name),
                    to: this.asPX(name, b),
                    f: getNumber
                };
            }
        });
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    // 
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    // 
    // http://www.apache.org/licenses/LICENSE-2.0
    // 
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob) {
        var elproto = Element.prototype,
            has = "hasOwnProperty",
            supportsTouch = "createTouch" in glob.doc,
            events = [
                "click", "dblclick", "mousedown", "mousemove", "mouseout",
                "mouseover", "mouseup", "touchstart", "touchmove", "touchend",
                "touchcancel"
            ],
            touchMap = {
                mousedown: "touchstart",
                mousemove: "touchmove",
                mouseup: "touchend"
            },
            getScroll = function (xy, el) {
                var name = xy == "y" ? "scrollTop" : "scrollLeft",
                    doc = el && el.node ? el.node.ownerDocument : glob.doc;
                return doc[name in doc.documentElement ? "documentElement" : "body"][name];
            },
            preventDefault = function () {
                this.returnValue = false;
            },
            preventTouch = function () {
                return this.originalEvent.preventDefault();
            },
            stopPropagation = function () {
                this.cancelBubble = true;
            },
            stopTouch = function () {
                return this.originalEvent.stopPropagation();
            },
            addEvent = function (obj, type, fn, element) {
                var realName = supportsTouch && touchMap[type] ? touchMap[type] : type,
                    f = function (e) {
                        var scrollY = getScroll("y", element),
                            scrollX = getScroll("x", element);
                        if (supportsTouch && touchMap[has](type)) {
                            for (var i = 0, ii = e.targetTouches && e.targetTouches.length; i < ii; i++) {
                                if (e.targetTouches[i].target == obj || obj.contains(e.targetTouches[i].target)) {
                                    var olde = e;
                                    e = e.targetTouches[i];
                                    e.originalEvent = olde;
                                    e.preventDefault = preventTouch;
                                    e.stopPropagation = stopTouch;
                                    break;
                                }
                            }
                        }
                        var x = e.clientX + scrollX,
                            y = e.clientY + scrollY;
                        return fn.call(element, e, x, y);
                    };

                if (type !== realName) {
                    obj.addEventListener(type, f, false);
                }

                obj.addEventListener(realName, f, false);

                return function () {
                    if (type !== realName) {
                        obj.removeEventListener(type, f, false);
                    }

                    obj.removeEventListener(realName, f, false);
                    return true;
                };
            },
            drag = [],
            dragMove = function (e) {
                var x = e.clientX,
                    y = e.clientY,
                    scrollY = getScroll("y"),
                    scrollX = getScroll("x"),
                    dragi,
                    j = drag.length;
                while (j--) {
                    dragi = drag[j];
                    if (supportsTouch) {
                        var i = e.touches && e.touches.length,
                            touch;
                        while (i--) {
                            touch = e.touches[i];
                            if (touch.identifier == dragi.el._drag.id || dragi.el.node.contains(touch.target)) {
                                x = touch.clientX;
                                y = touch.clientY;
                                (e.originalEvent ? e.originalEvent : e).preventDefault();
                                break;
                            }
                        }
                    } else {
                        e.preventDefault();
                    }
                    var node = dragi.el.node,
                        o,
                        next = node.nextSibling,
                        parent = node.parentNode,
                        display = node.style.display;
                    // glob.win.opera && parent.removeChild(node);
                    // node.style.display = "none";
                    // o = dragi.el.paper.getElementByPoint(x, y);
                    // node.style.display = display;
                    // glob.win.opera && (next ? parent.insertBefore(node, next) : parent.appendChild(node));
                    // o && eve("snap.drag.over." + dragi.el.id, dragi.el, o);
                    x += scrollX;
                    y += scrollY;
                    eve("snap.drag.move." + dragi.el.id, dragi.move_scope || dragi.el, x - dragi.el._drag.x, y - dragi.el._drag.y, x, y, e);
                }
            },
            dragUp = function (e) {
                Snap.unmousemove(dragMove).unmouseup(dragUp);
                var i = drag.length,
                    dragi;
                while (i--) {
                    dragi = drag[i];
                    dragi.el._drag = {};
                    eve("snap.drag.end." + dragi.el.id, dragi.end_scope || dragi.start_scope || dragi.move_scope || dragi.el, e);
                    eve.off("snap.drag.*." + dragi.el.id);
                }
                drag = [];
            };
        /*\
         * Element.click
         [ method ]
         **
         * Adds a click event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.unclick
         [ method ]
         **
         * Removes a click event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.dblclick
         [ method ]
         **
         * Adds a double click event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.undblclick
         [ method ]
         **
         * Removes a double click event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.mousedown
         [ method ]
         **
         * Adds a mousedown event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.unmousedown
         [ method ]
         **
         * Removes a mousedown event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.mousemove
         [ method ]
         **
         * Adds a mousemove event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.unmousemove
         [ method ]
         **
         * Removes a mousemove event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.mouseout
         [ method ]
         **
         * Adds a mouseout event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.unmouseout
         [ method ]
         **
         * Removes a mouseout event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.mouseover
         [ method ]
         **
         * Adds a mouseover event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.unmouseover
         [ method ]
         **
         * Removes a mouseover event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.mouseup
         [ method ]
         **
         * Adds a mouseup event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.unmouseup
         [ method ]
         **
         * Removes a mouseup event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.touchstart
         [ method ]
         **
         * Adds a touchstart event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.untouchstart
         [ method ]
         **
         * Removes a touchstart event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.touchmove
         [ method ]
         **
         * Adds a touchmove event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.untouchmove
         [ method ]
         **
         * Removes a touchmove event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.touchend
         [ method ]
         **
         * Adds a touchend event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.untouchend
         [ method ]
         **
         * Removes a touchend event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/

        /*\
         * Element.touchcancel
         [ method ]
         **
         * Adds a touchcancel event handler to the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        /*\
         * Element.untouchcancel
         [ method ]
         **
         * Removes a touchcancel event handler from the element
         - handler (function) handler for the event
         = (object) @Element
        \*/
        for (var i = events.length; i--;) {
            (function (eventName) {
                Snap[eventName] = elproto[eventName] = function (fn, scope) {
                    if (Snap.is(fn, "function")) {
                        this.events = this.events || [];
                        this.events.push({
                            name: eventName,
                            f: fn,
                            unbind: addEvent(this.node || document, eventName, fn, scope || this)
                        });
                    } else {
                        for (var i = 0, ii = this.events.length; i < ii; i++) if (this.events[i].name == eventName) {
                            try {
                                this.events[i].f.call(this);
                            } catch (e) { }
                        }
                    }
                    return this;
                };
                Snap["un" + eventName] =
                    elproto["un" + eventName] = function (fn) {
                        var events = this.events || [],
                            l = events.length;
                        while (l--) if (events[l].name == eventName &&
                            (events[l].f == fn || !fn)) {
                            events[l].unbind();
                            events.splice(l, 1);
                            !events.length && delete this.events;
                            return this;
                        }
                        return this;
                    };
            })(events[i]);
        }
        /*\
         * Element.hover
         [ method ]
         **
         * Adds hover event handlers to the element
         - f_in (function) handler for hover in
         - f_out (function) handler for hover out
         - icontext (object) #optional context for hover in handler
         - ocontext (object) #optional context for hover out handler
         = (object) @Element
        \*/
        elproto.hover = function (f_in, f_out, scope_in, scope_out) {
            return this.mouseover(f_in, scope_in).mouseout(f_out, scope_out || scope_in);
        };
        /*\
         * Element.unhover
         [ method ]
         **
         * Removes hover event handlers from the element
         - f_in (function) handler for hover in
         - f_out (function) handler for hover out
         = (object) @Element
        \*/
        elproto.unhover = function (f_in, f_out) {
            return this.unmouseover(f_in).unmouseout(f_out);
        };
        var draggable = [];
        // SIERRA unclear what _context_ refers to for starting, ending, moving the drag gesture.
        // SIERRA Element.drag(): _x position of the mouse_: Where are the x/y values offset from?
        // SIERRA Element.drag(): much of this member's doc appears to be duplicated for some reason.
        // SIERRA Unclear about this sentence: _Additionally following drag events will be triggered: drag.start.<id> on start, drag.end.<id> on end and drag.move.<id> on every move._ Is there a global _drag_ object to which you can assign handlers keyed by an element's ID?
        /*\
         * Element.drag
         [ method ]
         **
         * Adds event handlers for an element's drag gesture
         **
         - onmove (function) handler for moving
         - onstart (function) handler for drag start
         - onend (function) handler for drag end
         - mcontext (object) #optional context for moving handler
         - scontext (object) #optional context for drag start handler
         - econtext (object) #optional context for drag end handler
         * Additionaly following `drag` events are triggered: `drag.start.<id>` on start, 
         * `drag.end.<id>` on end and `drag.move.<id>` on every move. When element is dragged over another element 
         * `drag.over.<id>` fires as well.
         *
         * Start event and start handler are called in specified context or in context of the element with following parameters:
         o x (number) x position of the mouse
         o y (number) y position of the mouse
         o event (object) DOM event object
         * Move event and move handler are called in specified context or in context of the element with following parameters:
         o dx (number) shift by x from the start point
         o dy (number) shift by y from the start point
         o x (number) x position of the mouse
         o y (number) y position of the mouse
         o event (object) DOM event object
         * End event and end handler are called in specified context or in context of the element with following parameters:
         o event (object) DOM event object
         = (object) @Element
        \*/
        elproto.drag = function (onmove, onstart, onend, move_scope, start_scope, end_scope) {
            var el = this;
            if (!arguments.length) {
                var origTransform;
                return el.drag(function (dx, dy) {
                    this.attr({
                        transform: origTransform + (origTransform ? "T" : "t") + [dx, dy]
                    });
                }, function () {
                    origTransform = this.transform().local;
                });
            }
            function start(e, x, y) {
                (e.originalEvent || e).preventDefault();
                el._drag.x = x;
                el._drag.y = y;
                el._drag.id = e.identifier;
                !drag.length && Snap.mousemove(dragMove).mouseup(dragUp);
                drag.push({ el: el, move_scope: move_scope, start_scope: start_scope, end_scope: end_scope });
                onstart && eve.on("snap.drag.start." + el.id, onstart);
                onmove && eve.on("snap.drag.move." + el.id, onmove);
                onend && eve.on("snap.drag.end." + el.id, onend);
                eve("snap.drag.start." + el.id, start_scope || move_scope || el, x, y, e);
            }
            function init(e, x, y) {
                eve("snap.draginit." + el.id, el, e, x, y);
            }
            eve.on("snap.draginit." + el.id, start);
            el._drag = {};
            draggable.push({ el: el, start: start, init: init });
            el.mousedown(init);
            return el;
        };
        /*
         * Element.onDragOver
         [ method ]
         **
         * Shortcut to assign event handler for `drag.over.<id>` event, where `id` is the element's `id` (see @Element.id)
         - f (function) handler for event, first argument would be the element you are dragging over
        \*/
        // elproto.onDragOver = function (f) {
        //     f ? eve.on("snap.drag.over." + this.id, f) : eve.unbind("snap.drag.over." + this.id);
        // };
        /*\
         * Element.undrag
         [ method ]
         **
         * Removes all drag event handlers from the given element
        \*/
        elproto.undrag = function () {
            var i = draggable.length;
            while (i--) if (draggable[i].el == this) {
                this.unmousedown(draggable[i].init);
                draggable.splice(i, 1);
                eve.unbind("snap.drag.*." + this.id);
                eve.unbind("snap.draginit." + this.id);
            }
            !draggable.length && Snap.unmousemove(dragMove).unmouseup(dragUp);
            return this;
        };
    });

    // Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob) {
        var elproto = Element.prototype,
            pproto = Paper.prototype,
            rgurl = /^\s*url\((.+)\)/,
            Str = String,
            $ = Snap._.$;
        Snap.filter = {};
        /*\
         * Paper.filter
         [ method ]
         **
         * Creates a `<filter>` element
         **
         - filstr (string) SVG fragment of filter provided as a string
         = (object) @Element
         * Note: It is recommended to use filters embedded into the page inside an empty SVG element.
         > Usage
         | var f = paper.filter('<feGaussianBlur stdDeviation="2"/>'),
         |     c = paper.circle(10, 10, 10).attr({
         |         filter: f
         |     });
        \*/
        pproto.filter = function (filstr) {
            var paper = this;
            if (paper.type != "svg") {
                paper = paper.paper;
            }
            var f = Snap.parse(Str(filstr)),
                id = Snap._.id(),
                width = paper.node.offsetWidth,
                height = paper.node.offsetHeight,
                filter = $("filter");
            $(filter, {
                id: id,
                filterUnits: "userSpaceOnUse"
            });
            filter.appendChild(f.node);
            paper.defs.appendChild(filter);
            return new Element(filter);
        };

        eve.on("snap.util.getattr.filter", function () {
            eve.stop();
            var p = $(this.node, "filter");
            if (p) {
                var match = Str(p).match(rgurl);
                return match && Snap.select(match[1]);
            }
        });
        eve.on("snap.util.attr.filter", function (value) {
            if (value instanceof Element && value.type == "filter") {
                eve.stop();
                var id = value.node.id;
                if (!id) {
                    $(value.node, { id: value.id });
                    id = value.id;
                }
                $(this.node, {
                    filter: Snap.url(id)
                });
            }
            if (!value || value == "none") {
                eve.stop();
                this.node.removeAttribute("filter");
            }
        });
        /*\
         * Snap.filter.blur
         [ method ]
         **
         * Returns an SVG markup string for the blur filter
         **
         - x (number) amount of horizontal blur, in pixels
         - y (number) #optional amount of vertical blur, in pixels
         = (string) filter representation
         > Usage
         | var f = paper.filter(Snap.filter.blur(5, 10)),
         |     c = paper.circle(10, 10, 10).attr({
         |         filter: f
         |     });
        \*/
        Snap.filter.blur = function (x, y) {
            if (x == null) {
                x = 2;
            }
            var def = y == null ? x : [x, y];
            return Snap.format('\<feGaussianBlur stdDeviation="{def}"/>', {
                def: def
            });
        };
        Snap.filter.blur.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.shadow
         [ method ]
         **
         * Returns an SVG markup string for the shadow filter
         **
         - dx (number) #optional horizontal shift of the shadow, in pixels
         - dy (number) #optional vertical shift of the shadow, in pixels
         - blur (number) #optional amount of blur
         - color (string) #optional color of the shadow
         - opacity (number) #optional `0..1` opacity of the shadow
         * or
         - dx (number) #optional horizontal shift of the shadow, in pixels
         - dy (number) #optional vertical shift of the shadow, in pixels
         - color (string) #optional color of the shadow
         - opacity (number) #optional `0..1` opacity of the shadow
         * which makes blur default to `4`. Or
         - dx (number) #optional horizontal shift of the shadow, in pixels
         - dy (number) #optional vertical shift of the shadow, in pixels
         - opacity (number) #optional `0..1` opacity of the shadow
         = (string) filter representation
         > Usage
         | var f = paper.filter(Snap.filter.shadow(0, 2, .3)),
         |     c = paper.circle(10, 10, 10).attr({
         |         filter: f
         |     });
        \*/
        Snap.filter.shadow = function (dx, dy, blur, color, opacity) {
            if (opacity == null) {
                if (color == null) {
                    opacity = blur;
                    blur = 4;
                    color = "#000";
                } else {
                    opacity = color;
                    color = blur;
                    blur = 4;
                }
            }
            if (blur == null) {
                blur = 4;
            }
            if (opacity == null) {
                opacity = 1;
            }
            if (dx == null) {
                dx = 0;
                dy = 2;
            }
            if (dy == null) {
                dy = dx;
            }
            color = Snap.color(color);
            return Snap.format('<feGaussianBlur in="SourceAlpha" stdDeviation="{blur}"/><feOffset dx="{dx}" dy="{dy}" result="offsetblur"/><feFlood flood-color="{color}"/><feComposite in2="offsetblur" operator="in"/><feComponentTransfer><feFuncA type="linear" slope="{opacity}"/></feComponentTransfer><feMerge><feMergeNode/><feMergeNode in="SourceGraphic"/></feMerge>', {
                color: color,
                dx: dx,
                dy: dy,
                blur: blur,
                opacity: opacity
            });
        };
        Snap.filter.shadow.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.grayscale
         [ method ]
         **
         * Returns an SVG markup string for the grayscale filter
         **
         - amount (number) amount of filter (`0..1`)
         = (string) filter representation
        \*/
        Snap.filter.grayscale = function (amount) {
            if (amount == null) {
                amount = 1;
            }
            return Snap.format('<feColorMatrix type="matrix" values="{a} {b} {c} 0 0 {d} {e} {f} 0 0 {g} {b} {h} 0 0 0 0 0 1 0"/>', {
                a: 0.2126 + 0.7874 * (1 - amount),
                b: 0.7152 - 0.7152 * (1 - amount),
                c: 0.0722 - 0.0722 * (1 - amount),
                d: 0.2126 - 0.2126 * (1 - amount),
                e: 0.7152 + 0.2848 * (1 - amount),
                f: 0.0722 - 0.0722 * (1 - amount),
                g: 0.2126 - 0.2126 * (1 - amount),
                h: 0.0722 + 0.9278 * (1 - amount)
            });
        };
        Snap.filter.grayscale.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.sepia
         [ method ]
         **
         * Returns an SVG markup string for the sepia filter
         **
         - amount (number) amount of filter (`0..1`)
         = (string) filter representation
        \*/
        Snap.filter.sepia = function (amount) {
            if (amount == null) {
                amount = 1;
            }
            return Snap.format('<feColorMatrix type="matrix" values="{a} {b} {c} 0 0 {d} {e} {f} 0 0 {g} {h} {i} 0 0 0 0 0 1 0"/>', {
                a: 0.393 + 0.607 * (1 - amount),
                b: 0.769 - 0.769 * (1 - amount),
                c: 0.189 - 0.189 * (1 - amount),
                d: 0.349 - 0.349 * (1 - amount),
                e: 0.686 + 0.314 * (1 - amount),
                f: 0.168 - 0.168 * (1 - amount),
                g: 0.272 - 0.272 * (1 - amount),
                h: 0.534 - 0.534 * (1 - amount),
                i: 0.131 + 0.869 * (1 - amount)
            });
        };
        Snap.filter.sepia.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.saturate
         [ method ]
         **
         * Returns an SVG markup string for the saturate filter
         **
         - amount (number) amount of filter (`0..1`)
         = (string) filter representation
        \*/
        Snap.filter.saturate = function (amount) {
            if (amount == null) {
                amount = 1;
            }
            return Snap.format('<feColorMatrix type="saturate" values="{amount}"/>', {
                amount: 1 - amount
            });
        };
        Snap.filter.saturate.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.hueRotate
         [ method ]
         **
         * Returns an SVG markup string for the hue-rotate filter
         **
         - angle (number) angle of rotation
         = (string) filter representation
        \*/
        Snap.filter.hueRotate = function (angle) {
            angle = angle || 0;
            return Snap.format('<feColorMatrix type="hueRotate" values="{angle}"/>', {
                angle: angle
            });
        };
        Snap.filter.hueRotate.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.invert
         [ method ]
         **
         * Returns an SVG markup string for the invert filter
         **
         - amount (number) amount of filter (`0..1`)
         = (string) filter representation
        \*/
        Snap.filter.invert = function (amount) {
            if (amount == null) {
                amount = 1;
            }
            //        <feColorMatrix type="matrix" values="-1 0 0 0 1  0 -1 0 0 1  0 0 -1 0 1  0 0 0 1 0" color-interpolation-filters="sRGB"/>
            return Snap.format('<feComponentTransfer><feFuncR type="table" tableValues="{amount} {amount2}"/><feFuncG type="table" tableValues="{amount} {amount2}"/><feFuncB type="table" tableValues="{amount} {amount2}"/></feComponentTransfer>', {
                amount: amount,
                amount2: 1 - amount
            });
        };
        Snap.filter.invert.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.brightness
         [ method ]
         **
         * Returns an SVG markup string for the brightness filter
         **
         - amount (number) amount of filter (`0..1`)
         = (string) filter representation
        \*/
        Snap.filter.brightness = function (amount) {
            if (amount == null) {
                amount = 1;
            }
            return Snap.format('<feComponentTransfer><feFuncR type="linear" slope="{amount}"/><feFuncG type="linear" slope="{amount}"/><feFuncB type="linear" slope="{amount}"/></feComponentTransfer>', {
                amount: amount
            });
        };
        Snap.filter.brightness.toString = function () {
            return this();
        };
        /*\
         * Snap.filter.contrast
         [ method ]
         **
         * Returns an SVG markup string for the contrast filter
         **
         - amount (number) amount of filter (`0..1`)
         = (string) filter representation
        \*/
        Snap.filter.contrast = function (amount) {
            if (amount == null) {
                amount = 1;
            }
            return Snap.format('<feComponentTransfer><feFuncR type="linear" slope="{amount}" intercept="{amount2}"/><feFuncG type="linear" slope="{amount}" intercept="{amount2}"/><feFuncB type="linear" slope="{amount}" intercept="{amount2}"/></feComponentTransfer>', {
                amount: amount,
                amount2: .5 - amount / 2
            });
        };
        Snap.filter.contrast.toString = function () {
            return this();
        };
    });

    // Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
        var box = Snap._.box,
            is = Snap.is,
            firstLetter = /^[^a-z]*([tbmlrc])/i,
            toString = function () {
                return "T" + this.dx + "," + this.dy;
            };
        /*\
         * Element.getAlign
         [ method ]
         **
         * Returns shift needed to align the element relatively to given element.
         * If no elements specified, parent `<svg>` container will be used.
         - el (object) @optional alignment element
         - way (string) one of six values: `"top"`, `"middle"`, `"bottom"`, `"left"`, `"center"`, `"right"`
         = (object|string) Object in format `{dx: , dy: }` also has a string representation as a transformation string
         > Usage
         | el.transform(el.getAlign(el2, "top"));
         * or
         | var dy = el.getAlign(el2, "top").dy;
        \*/
        Element.prototype.getAlign = function (el, way) {
            if (way == null && is(el, "string")) {
                way = el;
                el = null;
            }
            el = el || this.paper;
            var bx = el.getBBox ? el.getBBox() : box(el),
                bb = this.getBBox(),
                out = {};
            way = way && way.match(firstLetter);
            way = way ? way[1].toLowerCase() : "c";
            switch (way) {
                case "t":
                    out.dx = 0;
                    out.dy = bx.y - bb.y;
                    break;
                case "b":
                    out.dx = 0;
                    out.dy = bx.y2 - bb.y2;
                    break;
                case "m":
                    out.dx = 0;
                    out.dy = bx.cy - bb.cy;
                    break;
                case "l":
                    out.dx = bx.x - bb.x;
                    out.dy = 0;
                    break;
                case "r":
                    out.dx = bx.x2 - bb.x2;
                    out.dy = 0;
                    break;
                default:
                    out.dx = bx.cx - bb.cx;
                    out.dy = 0;
                    break;
            }
            out.toString = toString;
            return out;
        };
        /*\
         * Element.align
         [ method ]
         **
         * Aligns the element relatively to given one via transformation.
         * If no elements specified, parent `<svg>` container will be used.
         - el (object) @optional alignment element
         - way (string) one of six values: `"top"`, `"middle"`, `"bottom"`, `"left"`, `"center"`, `"right"`
         = (object) this element
         > Usage
         | el.align(el2, "top");
         * or
         | el.align("middle");
        \*/
        Element.prototype.align = function (el, way) {
            return this.transform("..." + this.getAlign(el, way));
        };
    });

    // Copyright (c) 2017 Adobe Systems Incorporated. All rights reserved.
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    // http://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    Snap.plugin(function (Snap, Element, Paper, glob) {
        // Colours are from https://www.materialui.co
        var red = "#ffebee#ffcdd2#ef9a9a#e57373#ef5350#f44336#e53935#d32f2f#c62828#b71c1c#ff8a80#ff5252#ff1744#d50000",
            pink = "#FCE4EC#F8BBD0#F48FB1#F06292#EC407A#E91E63#D81B60#C2185B#AD1457#880E4F#FF80AB#FF4081#F50057#C51162",
            purple = "#F3E5F5#E1BEE7#CE93D8#BA68C8#AB47BC#9C27B0#8E24AA#7B1FA2#6A1B9A#4A148C#EA80FC#E040FB#D500F9#AA00FF",
            deeppurple = "#EDE7F6#D1C4E9#B39DDB#9575CD#7E57C2#673AB7#5E35B1#512DA8#4527A0#311B92#B388FF#7C4DFF#651FFF#6200EA",
            indigo = "#E8EAF6#C5CAE9#9FA8DA#7986CB#5C6BC0#3F51B5#3949AB#303F9F#283593#1A237E#8C9EFF#536DFE#3D5AFE#304FFE",
            blue = "#E3F2FD#BBDEFB#90CAF9#64B5F6#64B5F6#2196F3#1E88E5#1976D2#1565C0#0D47A1#82B1FF#448AFF#2979FF#2962FF",
            lightblue = "#E1F5FE#B3E5FC#81D4FA#4FC3F7#29B6F6#03A9F4#039BE5#0288D1#0277BD#01579B#80D8FF#40C4FF#00B0FF#0091EA",
            cyan = "#E0F7FA#B2EBF2#80DEEA#4DD0E1#26C6DA#00BCD4#00ACC1#0097A7#00838F#006064#84FFFF#18FFFF#00E5FF#00B8D4",
            teal = "#E0F2F1#B2DFDB#80CBC4#4DB6AC#26A69A#009688#00897B#00796B#00695C#004D40#A7FFEB#64FFDA#1DE9B6#00BFA5",
            green = "#E8F5E9#C8E6C9#A5D6A7#81C784#66BB6A#4CAF50#43A047#388E3C#2E7D32#1B5E20#B9F6CA#69F0AE#00E676#00C853",
            lightgreen = "#F1F8E9#DCEDC8#C5E1A5#AED581#9CCC65#8BC34A#7CB342#689F38#558B2F#33691E#CCFF90#B2FF59#76FF03#64DD17",
            lime = "#F9FBE7#F0F4C3#E6EE9C#DCE775#D4E157#CDDC39#C0CA33#AFB42B#9E9D24#827717#F4FF81#EEFF41#C6FF00#AEEA00",
            yellow = "#FFFDE7#FFF9C4#FFF59D#FFF176#FFEE58#FFEB3B#FDD835#FBC02D#F9A825#F57F17#FFFF8D#FFFF00#FFEA00#FFD600",
            amber = "#FFF8E1#FFECB3#FFE082#FFD54F#FFCA28#FFC107#FFB300#FFA000#FF8F00#FF6F00#FFE57F#FFD740#FFC400#FFAB00",
            orange = "#FFF3E0#FFE0B2#FFCC80#FFB74D#FFA726#FF9800#FB8C00#F57C00#EF6C00#E65100#FFD180#FFAB40#FF9100#FF6D00",
            deeporange = "#FBE9E7#FFCCBC#FFAB91#FF8A65#FF7043#FF5722#F4511E#E64A19#D84315#BF360C#FF9E80#FF6E40#FF3D00#DD2C00",
            brown = "#EFEBE9#D7CCC8#BCAAA4#A1887F#8D6E63#795548#6D4C41#5D4037#4E342E#3E2723",
            grey = "#FAFAFA#F5F5F5#EEEEEE#E0E0E0#BDBDBD#9E9E9E#757575#616161#424242#212121",
            bluegrey = "#ECEFF1#CFD8DC#B0BEC5#90A4AE#78909C#607D8B#546E7A#455A64#37474F#263238";
        /*\
         * Snap.mui
         [ property ]
         **
         * Contain Material UI colours.
         | Snap().rect(0, 0, 10, 10).attr({fill: Snap.mui.deeppurple, stroke: Snap.mui.amber[600]});
         # For colour reference: <a href="https://www.materialui.co">https://www.materialui.co</a>.
        \*/
        Snap.mui = {};
        /*\
         * Snap.flat
         [ property ]
         **
         * Contain Flat UI colours.
         | Snap().rect(0, 0, 10, 10).attr({fill: Snap.flat.carrot, stroke: Snap.flat.wetasphalt});
         # For colour reference: <a href="https://www.materialui.co">https://www.materialui.co</a>.
        \*/
        Snap.flat = {};
        function saveColor(colors) {
            colors = colors.split(/(?=#)/);
            var color = new String(colors[5]);
            color[50] = colors[0];
            color[100] = colors[1];
            color[200] = colors[2];
            color[300] = colors[3];
            color[400] = colors[4];
            color[500] = colors[5];
            color[600] = colors[6];
            color[700] = colors[7];
            color[800] = colors[8];
            color[900] = colors[9];
            if (colors[10]) {
                color.A100 = colors[10];
                color.A200 = colors[11];
                color.A400 = colors[12];
                color.A700 = colors[13];
            }
            return color;
        }
        Snap.mui.red = saveColor(red);
        Snap.mui.pink = saveColor(pink);
        Snap.mui.purple = saveColor(purple);
        Snap.mui.deeppurple = saveColor(deeppurple);
        Snap.mui.indigo = saveColor(indigo);
        Snap.mui.blue = saveColor(blue);
        Snap.mui.lightblue = saveColor(lightblue);
        Snap.mui.cyan = saveColor(cyan);
        Snap.mui.teal = saveColor(teal);
        Snap.mui.green = saveColor(green);
        Snap.mui.lightgreen = saveColor(lightgreen);
        Snap.mui.lime = saveColor(lime);
        Snap.mui.yellow = saveColor(yellow);
        Snap.mui.amber = saveColor(amber);
        Snap.mui.orange = saveColor(orange);
        Snap.mui.deeporange = saveColor(deeporange);
        Snap.mui.brown = saveColor(brown);
        Snap.mui.grey = saveColor(grey);
        Snap.mui.bluegrey = saveColor(bluegrey);
        Snap.flat.turquoise = "#1abc9c";
        Snap.flat.greensea = "#16a085";
        Snap.flat.sunflower = "#f1c40f";
        Snap.flat.orange = "#f39c12";
        Snap.flat.emerland = "#2ecc71";
        Snap.flat.nephritis = "#27ae60";
        Snap.flat.carrot = "#e67e22";
        Snap.flat.pumpkin = "#d35400";
        Snap.flat.peterriver = "#3498db";
        Snap.flat.belizehole = "#2980b9";
        Snap.flat.alizarin = "#e74c3c";
        Snap.flat.pomegranate = "#c0392b";
        Snap.flat.amethyst = "#9b59b6";
        Snap.flat.wisteria = "#8e44ad";
        Snap.flat.clouds = "#ecf0f1";
        Snap.flat.silver = "#bdc3c7";
        Snap.flat.wetasphalt = "#34495e";
        Snap.flat.midnightblue = "#2c3e50";
        Snap.flat.concrete = "#95a5a6";
        Snap.flat.asbestos = "#7f8c8d";
        /*\
         * Snap.importMUIColors
         [ method ]
         **
         * Imports Material UI colours into global object.
         | Snap.importMUIColors();
         | Snap().rect(0, 0, 10, 10).attr({fill: deeppurple, stroke: amber[600]});
         # For colour reference: <a href="https://www.materialui.co">https://www.materialui.co</a>.
        \*/
        Snap.importMUIColors = function () {
            for (var color in Snap.mui) {
                if (Snap.mui.hasOwnProperty(color)) {
                    window[color] = Snap.mui[color];
                }
            }
        };
    });

    return Snap;
}));